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Commit | Line | Data |
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1da177e4 LT |
1 | /* |
2 | * fs/cifs/connect.c | |
3 | * | |
d185cda7 | 4 | * Copyright (C) International Business Machines Corp., 2002,2009 |
1da177e4 LT |
5 | * Author(s): Steve French (sfrench@us.ibm.com) |
6 | * | |
7 | * This library is free software; you can redistribute it and/or modify | |
8 | * it under the terms of the GNU Lesser General Public License as published | |
9 | * by the Free Software Foundation; either version 2.1 of the License, or | |
10 | * (at your option) any later version. | |
11 | * | |
12 | * This library is distributed in the hope that it will be useful, | |
13 | * but WITHOUT ANY WARRANTY; without even the implied warranty of | |
14 | * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See | |
15 | * the GNU Lesser General Public License for more details. | |
16 | * | |
17 | * You should have received a copy of the GNU Lesser General Public License | |
18 | * along with this library; if not, write to the Free Software | |
fb8c4b14 | 19 | * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA |
1da177e4 LT |
20 | */ |
21 | #include <linux/fs.h> | |
22 | #include <linux/net.h> | |
23 | #include <linux/string.h> | |
24 | #include <linux/list.h> | |
25 | #include <linux/wait.h> | |
5a0e3ad6 | 26 | #include <linux/slab.h> |
1da177e4 LT |
27 | #include <linux/pagemap.h> |
28 | #include <linux/ctype.h> | |
29 | #include <linux/utsname.h> | |
30 | #include <linux/mempool.h> | |
b8643e1b | 31 | #include <linux/delay.h> |
f191401f | 32 | #include <linux/completion.h> |
aaf737ad | 33 | #include <linux/kthread.h> |
0ae0efad | 34 | #include <linux/pagevec.h> |
7dfb7103 | 35 | #include <linux/freezer.h> |
5c2503a8 | 36 | #include <linux/namei.h> |
1da177e4 LT |
37 | #include <asm/uaccess.h> |
38 | #include <asm/processor.h> | |
50b64e3b | 39 | #include <linux/inet.h> |
0e2bedaa | 40 | #include <net/ipv6.h> |
1da177e4 LT |
41 | #include "cifspdu.h" |
42 | #include "cifsglob.h" | |
43 | #include "cifsproto.h" | |
44 | #include "cifs_unicode.h" | |
45 | #include "cifs_debug.h" | |
46 | #include "cifs_fs_sb.h" | |
47 | #include "ntlmssp.h" | |
48 | #include "nterr.h" | |
49 | #include "rfc1002pdu.h" | |
a2653eba | 50 | #include "cn_cifs.h" |
488f1d2d | 51 | #include "fscache.h" |
1da177e4 LT |
52 | |
53 | #define CIFS_PORT 445 | |
54 | #define RFC1001_PORT 139 | |
55 | ||
1da177e4 LT |
56 | extern void SMBNTencrypt(unsigned char *passwd, unsigned char *c8, |
57 | unsigned char *p24); | |
58 | ||
59 | extern mempool_t *cifs_req_poolp; | |
60 | ||
61 | struct smb_vol { | |
62 | char *username; | |
63 | char *password; | |
64 | char *domainname; | |
65 | char *UNC; | |
66 | char *UNCip; | |
1da177e4 LT |
67 | char *iocharset; /* local code page for mapping to and from Unicode */ |
68 | char source_rfc1001_name[16]; /* netbios name of client */ | |
a10faeb2 | 69 | char target_rfc1001_name[16]; /* netbios name of server for Win9x/ME */ |
3e4b3e1f | 70 | uid_t cred_uid; |
1da177e4 LT |
71 | uid_t linux_uid; |
72 | gid_t linux_gid; | |
73 | mode_t file_mode; | |
74 | mode_t dir_mode; | |
189acaae | 75 | unsigned secFlg; |
4b18f2a9 SF |
76 | bool retry:1; |
77 | bool intr:1; | |
78 | bool setuids:1; | |
79 | bool override_uid:1; | |
80 | bool override_gid:1; | |
d0a9c078 | 81 | bool dynperm:1; |
4b18f2a9 SF |
82 | bool noperm:1; |
83 | bool no_psx_acl:1; /* set if posix acl support should be disabled */ | |
84 | bool cifs_acl:1; | |
85 | bool no_xattr:1; /* set if xattr (EA) support should be disabled*/ | |
86 | bool server_ino:1; /* use inode numbers from server ie UniqueId */ | |
87 | bool direct_io:1; | |
95b1cb90 SF |
88 | bool remap:1; /* set to remap seven reserved chars in filenames */ |
89 | bool posix_paths:1; /* unset to not ask for posix pathnames. */ | |
4b18f2a9 SF |
90 | bool no_linux_ext:1; |
91 | bool sfu_emul:1; | |
95b1cb90 SF |
92 | bool nullauth:1; /* attempt to authenticate with null user */ |
93 | bool nocase:1; /* request case insensitive filenames */ | |
94 | bool nobrl:1; /* disable sending byte range locks to srv */ | |
13a6e42a | 95 | bool mand_lock:1; /* send mandatory not posix byte range lock reqs */ |
95b1cb90 | 96 | bool seal:1; /* request transport encryption on share */ |
84210e91 SF |
97 | bool nodfs:1; /* Do not request DFS, even if available */ |
98 | bool local_lease:1; /* check leases only on local system, not remote */ | |
edf1ae40 SF |
99 | bool noblocksnd:1; |
100 | bool noautotune:1; | |
be652445 | 101 | bool nostrictsync:1; /* do not force expensive SMBflush on every sync */ |
fa1df75d | 102 | bool fsc:1; /* enable fscache */ |
1da177e4 LT |
103 | unsigned int rsize; |
104 | unsigned int wsize; | |
6a5fa236 | 105 | bool sockopt_tcp_nodelay:1; |
1da177e4 | 106 | unsigned short int port; |
fb8c4b14 | 107 | char *prepath; |
a5fc4ce0 | 108 | struct nls_table *local_nls; |
1da177e4 LT |
109 | }; |
110 | ||
bcf4b106 | 111 | static int ipv4_connect(struct TCP_Server_Info *server); |
d5c5605c | 112 | static int ipv6_connect(struct TCP_Server_Info *server); |
1da177e4 | 113 | |
d5c5605c JL |
114 | /* |
115 | * cifs tcp session reconnection | |
116 | * | |
117 | * mark tcp session as reconnecting so temporarily locked | |
118 | * mark all smb sessions as reconnecting for tcp session | |
119 | * reconnect tcp session | |
120 | * wake up waiters on reconnection? - (not needed currently) | |
121 | */ | |
2cd646a2 | 122 | static int |
1da177e4 LT |
123 | cifs_reconnect(struct TCP_Server_Info *server) |
124 | { | |
125 | int rc = 0; | |
f1987b44 | 126 | struct list_head *tmp, *tmp2; |
1da177e4 LT |
127 | struct cifsSesInfo *ses; |
128 | struct cifsTconInfo *tcon; | |
fb8c4b14 | 129 | struct mid_q_entry *mid_entry; |
50c2f753 | 130 | |
1da177e4 | 131 | spin_lock(&GlobalMid_Lock); |
469ee614 | 132 | if (server->tcpStatus == CifsExiting) { |
fb8c4b14 | 133 | /* the demux thread will exit normally |
1da177e4 LT |
134 | next time through the loop */ |
135 | spin_unlock(&GlobalMid_Lock); | |
136 | return rc; | |
137 | } else | |
138 | server->tcpStatus = CifsNeedReconnect; | |
139 | spin_unlock(&GlobalMid_Lock); | |
140 | server->maxBuf = 0; | |
141 | ||
b6b38f70 | 142 | cFYI(1, "Reconnecting tcp session"); |
1da177e4 LT |
143 | |
144 | /* before reconnecting the tcp session, mark the smb session (uid) | |
145 | and the tid bad so they are not used until reconnected */ | |
14fbf50d JL |
146 | read_lock(&cifs_tcp_ses_lock); |
147 | list_for_each(tmp, &server->smb_ses_list) { | |
148 | ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list); | |
149 | ses->need_reconnect = true; | |
150 | ses->ipc_tid = 0; | |
f1987b44 JL |
151 | list_for_each(tmp2, &ses->tcon_list) { |
152 | tcon = list_entry(tmp2, struct cifsTconInfo, tcon_list); | |
3b795210 | 153 | tcon->need_reconnect = true; |
1da177e4 | 154 | } |
1da177e4 | 155 | } |
f1987b44 | 156 | read_unlock(&cifs_tcp_ses_lock); |
1da177e4 | 157 | /* do not want to be sending data on a socket we are freeing */ |
72ca545b | 158 | mutex_lock(&server->srv_mutex); |
fb8c4b14 | 159 | if (server->ssocket) { |
b6b38f70 JP |
160 | cFYI(1, "State: 0x%x Flags: 0x%lx", server->ssocket->state, |
161 | server->ssocket->flags); | |
91cf45f0 | 162 | kernel_sock_shutdown(server->ssocket, SHUT_WR); |
b6b38f70 | 163 | cFYI(1, "Post shutdown state: 0x%x Flags: 0x%lx", |
467a8f8d | 164 | server->ssocket->state, |
b6b38f70 | 165 | server->ssocket->flags); |
1da177e4 LT |
166 | sock_release(server->ssocket); |
167 | server->ssocket = NULL; | |
168 | } | |
169 | ||
170 | spin_lock(&GlobalMid_Lock); | |
171 | list_for_each(tmp, &server->pending_mid_q) { | |
172 | mid_entry = list_entry(tmp, struct | |
173 | mid_q_entry, | |
174 | qhead); | |
ad8b15f0 | 175 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) { |
09d1db5c SF |
176 | /* Mark other intransit requests as needing |
177 | retry so we do not immediately mark the | |
178 | session bad again (ie after we reconnect | |
179 | below) as they timeout too */ | |
ad8b15f0 | 180 | mid_entry->midState = MID_RETRY_NEEDED; |
1da177e4 LT |
181 | } |
182 | } | |
183 | spin_unlock(&GlobalMid_Lock); | |
72ca545b | 184 | mutex_unlock(&server->srv_mutex); |
1da177e4 | 185 | |
469ee614 JL |
186 | while ((server->tcpStatus != CifsExiting) && |
187 | (server->tcpStatus != CifsGood)) { | |
6c3d8909 | 188 | try_to_freeze(); |
bcf4b106 | 189 | if (server->addr.sockAddr6.sin6_family == AF_INET6) |
d5c5605c | 190 | rc = ipv6_connect(server); |
bcf4b106 JL |
191 | else |
192 | rc = ipv4_connect(server); | |
fb8c4b14 | 193 | if (rc) { |
b6b38f70 | 194 | cFYI(1, "reconnect error %d", rc); |
0cb766ae | 195 | msleep(3000); |
1da177e4 LT |
196 | } else { |
197 | atomic_inc(&tcpSesReconnectCount); | |
198 | spin_lock(&GlobalMid_Lock); | |
469ee614 | 199 | if (server->tcpStatus != CifsExiting) |
1da177e4 | 200 | server->tcpStatus = CifsGood; |
ad009ac9 | 201 | server->sequence_number = 0; |
fb8c4b14 | 202 | spin_unlock(&GlobalMid_Lock); |
1da177e4 LT |
203 | /* atomic_set(&server->inFlight,0);*/ |
204 | wake_up(&server->response_q); | |
205 | } | |
206 | } | |
207 | return rc; | |
208 | } | |
209 | ||
fb8c4b14 | 210 | /* |
e4eb295d SF |
211 | return codes: |
212 | 0 not a transact2, or all data present | |
213 | >0 transact2 with that much data missing | |
214 | -EINVAL = invalid transact2 | |
215 | ||
216 | */ | |
fb8c4b14 | 217 | static int check2ndT2(struct smb_hdr *pSMB, unsigned int maxBufSize) |
e4eb295d | 218 | { |
fb8c4b14 SF |
219 | struct smb_t2_rsp *pSMBt; |
220 | int total_data_size; | |
e4eb295d SF |
221 | int data_in_this_rsp; |
222 | int remaining; | |
223 | ||
fb8c4b14 | 224 | if (pSMB->Command != SMB_COM_TRANSACTION2) |
e4eb295d SF |
225 | return 0; |
226 | ||
fb8c4b14 SF |
227 | /* check for plausible wct, bcc and t2 data and parm sizes */ |
228 | /* check for parm and data offset going beyond end of smb */ | |
229 | if (pSMB->WordCount != 10) { /* coalesce_t2 depends on this */ | |
b6b38f70 | 230 | cFYI(1, "invalid transact2 word count"); |
e4eb295d SF |
231 | return -EINVAL; |
232 | } | |
233 | ||
234 | pSMBt = (struct smb_t2_rsp *)pSMB; | |
235 | ||
236 | total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount); | |
237 | data_in_this_rsp = le16_to_cpu(pSMBt->t2_rsp.DataCount); | |
238 | ||
239 | remaining = total_data_size - data_in_this_rsp; | |
240 | ||
fb8c4b14 | 241 | if (remaining == 0) |
e4eb295d | 242 | return 0; |
fb8c4b14 | 243 | else if (remaining < 0) { |
b6b38f70 JP |
244 | cFYI(1, "total data %d smaller than data in frame %d", |
245 | total_data_size, data_in_this_rsp); | |
e4eb295d SF |
246 | return -EINVAL; |
247 | } else { | |
b6b38f70 JP |
248 | cFYI(1, "missing %d bytes from transact2, check next response", |
249 | remaining); | |
fb8c4b14 | 250 | if (total_data_size > maxBufSize) { |
b6b38f70 JP |
251 | cERROR(1, "TotalDataSize %d is over maximum buffer %d", |
252 | total_data_size, maxBufSize); | |
fb8c4b14 | 253 | return -EINVAL; |
e4eb295d SF |
254 | } |
255 | return remaining; | |
256 | } | |
257 | } | |
258 | ||
fb8c4b14 | 259 | static int coalesce_t2(struct smb_hdr *psecond, struct smb_hdr *pTargetSMB) |
e4eb295d SF |
260 | { |
261 | struct smb_t2_rsp *pSMB2 = (struct smb_t2_rsp *)psecond; | |
262 | struct smb_t2_rsp *pSMBt = (struct smb_t2_rsp *)pTargetSMB; | |
263 | int total_data_size; | |
264 | int total_in_buf; | |
265 | int remaining; | |
266 | int total_in_buf2; | |
fb8c4b14 SF |
267 | char *data_area_of_target; |
268 | char *data_area_of_buf2; | |
e4eb295d SF |
269 | __u16 byte_count; |
270 | ||
271 | total_data_size = le16_to_cpu(pSMBt->t2_rsp.TotalDataCount); | |
272 | ||
fb8c4b14 | 273 | if (total_data_size != le16_to_cpu(pSMB2->t2_rsp.TotalDataCount)) { |
b6b38f70 | 274 | cFYI(1, "total data size of primary and secondary t2 differ"); |
e4eb295d SF |
275 | } |
276 | ||
277 | total_in_buf = le16_to_cpu(pSMBt->t2_rsp.DataCount); | |
278 | ||
279 | remaining = total_data_size - total_in_buf; | |
50c2f753 | 280 | |
fb8c4b14 | 281 | if (remaining < 0) |
e4eb295d SF |
282 | return -EINVAL; |
283 | ||
fb8c4b14 | 284 | if (remaining == 0) /* nothing to do, ignore */ |
e4eb295d | 285 | return 0; |
50c2f753 | 286 | |
e4eb295d | 287 | total_in_buf2 = le16_to_cpu(pSMB2->t2_rsp.DataCount); |
fb8c4b14 | 288 | if (remaining < total_in_buf2) { |
b6b38f70 | 289 | cFYI(1, "transact2 2nd response contains too much data"); |
e4eb295d SF |
290 | } |
291 | ||
292 | /* find end of first SMB data area */ | |
fb8c4b14 | 293 | data_area_of_target = (char *)&pSMBt->hdr.Protocol + |
e4eb295d SF |
294 | le16_to_cpu(pSMBt->t2_rsp.DataOffset); |
295 | /* validate target area */ | |
296 | ||
297 | data_area_of_buf2 = (char *) &pSMB2->hdr.Protocol + | |
fb8c4b14 | 298 | le16_to_cpu(pSMB2->t2_rsp.DataOffset); |
e4eb295d SF |
299 | |
300 | data_area_of_target += total_in_buf; | |
301 | ||
302 | /* copy second buffer into end of first buffer */ | |
fb8c4b14 | 303 | memcpy(data_area_of_target, data_area_of_buf2, total_in_buf2); |
e4eb295d SF |
304 | total_in_buf += total_in_buf2; |
305 | pSMBt->t2_rsp.DataCount = cpu_to_le16(total_in_buf); | |
306 | byte_count = le16_to_cpu(BCC_LE(pTargetSMB)); | |
307 | byte_count += total_in_buf2; | |
308 | BCC_LE(pTargetSMB) = cpu_to_le16(byte_count); | |
309 | ||
70ca734a | 310 | byte_count = pTargetSMB->smb_buf_length; |
e4eb295d SF |
311 | byte_count += total_in_buf2; |
312 | ||
313 | /* BB also add check that we are not beyond maximum buffer size */ | |
50c2f753 | 314 | |
70ca734a | 315 | pTargetSMB->smb_buf_length = byte_count; |
e4eb295d | 316 | |
fb8c4b14 | 317 | if (remaining == total_in_buf2) { |
b6b38f70 | 318 | cFYI(1, "found the last secondary response"); |
e4eb295d SF |
319 | return 0; /* we are done */ |
320 | } else /* more responses to go */ | |
321 | return 1; | |
322 | ||
323 | } | |
324 | ||
1da177e4 LT |
325 | static int |
326 | cifs_demultiplex_thread(struct TCP_Server_Info *server) | |
327 | { | |
328 | int length; | |
329 | unsigned int pdu_length, total_read; | |
330 | struct smb_hdr *smb_buffer = NULL; | |
b8643e1b SF |
331 | struct smb_hdr *bigbuf = NULL; |
332 | struct smb_hdr *smallbuf = NULL; | |
1da177e4 LT |
333 | struct msghdr smb_msg; |
334 | struct kvec iov; | |
335 | struct socket *csocket = server->ssocket; | |
336 | struct list_head *tmp; | |
337 | struct cifsSesInfo *ses; | |
338 | struct task_struct *task_to_wake = NULL; | |
339 | struct mid_q_entry *mid_entry; | |
70ca734a | 340 | char temp; |
4b18f2a9 SF |
341 | bool isLargeBuf = false; |
342 | bool isMultiRsp; | |
e4eb295d | 343 | int reconnect; |
1da177e4 | 344 | |
1da177e4 | 345 | current->flags |= PF_MEMALLOC; |
b6b38f70 | 346 | cFYI(1, "Demultiplex PID: %d", task_pid_nr(current)); |
93d0ec85 JL |
347 | |
348 | length = atomic_inc_return(&tcpSesAllocCount); | |
349 | if (length > 1) | |
26f57364 SF |
350 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, |
351 | GFP_KERNEL); | |
1da177e4 | 352 | |
83144186 | 353 | set_freezable(); |
469ee614 | 354 | while (server->tcpStatus != CifsExiting) { |
ede1327e SF |
355 | if (try_to_freeze()) |
356 | continue; | |
b8643e1b SF |
357 | if (bigbuf == NULL) { |
358 | bigbuf = cifs_buf_get(); | |
0fd1ffe0 | 359 | if (!bigbuf) { |
b6b38f70 | 360 | cERROR(1, "No memory for large SMB response"); |
b8643e1b SF |
361 | msleep(3000); |
362 | /* retry will check if exiting */ | |
363 | continue; | |
364 | } | |
0fd1ffe0 PM |
365 | } else if (isLargeBuf) { |
366 | /* we are reusing a dirty large buf, clear its start */ | |
26f57364 | 367 | memset(bigbuf, 0, sizeof(struct smb_hdr)); |
1da177e4 | 368 | } |
b8643e1b SF |
369 | |
370 | if (smallbuf == NULL) { | |
371 | smallbuf = cifs_small_buf_get(); | |
0fd1ffe0 | 372 | if (!smallbuf) { |
b6b38f70 | 373 | cERROR(1, "No memory for SMB response"); |
b8643e1b SF |
374 | msleep(1000); |
375 | /* retry will check if exiting */ | |
376 | continue; | |
377 | } | |
378 | /* beginning of smb buffer is cleared in our buf_get */ | |
379 | } else /* if existing small buf clear beginning */ | |
26f57364 | 380 | memset(smallbuf, 0, sizeof(struct smb_hdr)); |
b8643e1b | 381 | |
4b18f2a9 SF |
382 | isLargeBuf = false; |
383 | isMultiRsp = false; | |
b8643e1b | 384 | smb_buffer = smallbuf; |
1da177e4 LT |
385 | iov.iov_base = smb_buffer; |
386 | iov.iov_len = 4; | |
387 | smb_msg.msg_control = NULL; | |
388 | smb_msg.msg_controllen = 0; | |
f01d5e14 SF |
389 | pdu_length = 4; /* enough to get RFC1001 header */ |
390 | incomplete_rcv: | |
1da177e4 LT |
391 | length = |
392 | kernel_recvmsg(csocket, &smb_msg, | |
f01d5e14 | 393 | &iov, 1, pdu_length, 0 /* BB other flags? */); |
1da177e4 | 394 | |
469ee614 | 395 | if (server->tcpStatus == CifsExiting) { |
1da177e4 LT |
396 | break; |
397 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
b6b38f70 | 398 | cFYI(1, "Reconnect after server stopped responding"); |
1da177e4 | 399 | cifs_reconnect(server); |
b6b38f70 | 400 | cFYI(1, "call to reconnect done"); |
1da177e4 LT |
401 | csocket = server->ssocket; |
402 | continue; | |
522bbe65 JL |
403 | } else if (length == -ERESTARTSYS || |
404 | length == -EAGAIN || | |
405 | length == -EINTR) { | |
b8643e1b | 406 | msleep(1); /* minimum sleep to prevent looping |
1da177e4 LT |
407 | allowing socket to clear and app threads to set |
408 | tcpStatus CifsNeedReconnect if server hung */ | |
c527c8a7 SF |
409 | if (pdu_length < 4) { |
410 | iov.iov_base = (4 - pdu_length) + | |
411 | (char *)smb_buffer; | |
412 | iov.iov_len = pdu_length; | |
413 | smb_msg.msg_control = NULL; | |
414 | smb_msg.msg_controllen = 0; | |
c18c732e | 415 | goto incomplete_rcv; |
c527c8a7 | 416 | } else |
c18c732e | 417 | continue; |
1da177e4 | 418 | } else if (length <= 0) { |
b6b38f70 JP |
419 | cFYI(1, "Reconnect after unexpected peek error %d", |
420 | length); | |
1da177e4 LT |
421 | cifs_reconnect(server); |
422 | csocket = server->ssocket; | |
423 | wake_up(&server->response_q); | |
424 | continue; | |
2a974680 | 425 | } else if (length < pdu_length) { |
b6b38f70 JP |
426 | cFYI(1, "requested %d bytes but only got %d bytes", |
427 | pdu_length, length); | |
f01d5e14 | 428 | pdu_length -= length; |
f01d5e14 SF |
429 | msleep(1); |
430 | goto incomplete_rcv; | |
46810cbf | 431 | } |
1da177e4 | 432 | |
70ca734a SF |
433 | /* The right amount was read from socket - 4 bytes */ |
434 | /* so we can now interpret the length field */ | |
46810cbf | 435 | |
70ca734a SF |
436 | /* the first byte big endian of the length field, |
437 | is actually not part of the length but the type | |
438 | with the most common, zero, as regular data */ | |
439 | temp = *((char *) smb_buffer); | |
46810cbf | 440 | |
fb8c4b14 | 441 | /* Note that FC 1001 length is big endian on the wire, |
70ca734a SF |
442 | but we convert it here so it is always manipulated |
443 | as host byte order */ | |
5ca33c6a | 444 | pdu_length = be32_to_cpu((__force __be32)smb_buffer->smb_buf_length); |
70ca734a SF |
445 | smb_buffer->smb_buf_length = pdu_length; |
446 | ||
b6b38f70 | 447 | cFYI(1, "rfc1002 length 0x%x", pdu_length+4); |
46810cbf | 448 | |
70ca734a | 449 | if (temp == (char) RFC1002_SESSION_KEEP_ALIVE) { |
fb8c4b14 | 450 | continue; |
70ca734a | 451 | } else if (temp == (char)RFC1002_POSITIVE_SESSION_RESPONSE) { |
b6b38f70 | 452 | cFYI(1, "Good RFC 1002 session rsp"); |
e4eb295d | 453 | continue; |
70ca734a | 454 | } else if (temp == (char)RFC1002_NEGATIVE_SESSION_RESPONSE) { |
fb8c4b14 | 455 | /* we get this from Windows 98 instead of |
46810cbf | 456 | an error on SMB negprot response */ |
b6b38f70 JP |
457 | cFYI(1, "Negative RFC1002 Session Response Error 0x%x)", |
458 | pdu_length); | |
7332f2a6 JL |
459 | /* give server a second to clean up */ |
460 | msleep(1000); | |
461 | /* always try 445 first on reconnect since we get NACK | |
462 | * on some if we ever connected to port 139 (the NACK | |
463 | * is since we do not begin with RFC1001 session | |
464 | * initialize frame) | |
465 | */ | |
32670396 JL |
466 | cifs_set_port((struct sockaddr *) |
467 | &server->addr.sockAddr, CIFS_PORT); | |
7332f2a6 JL |
468 | cifs_reconnect(server); |
469 | csocket = server->ssocket; | |
470 | wake_up(&server->response_q); | |
471 | continue; | |
70ca734a | 472 | } else if (temp != (char) 0) { |
b6b38f70 | 473 | cERROR(1, "Unknown RFC 1002 frame"); |
70ca734a SF |
474 | cifs_dump_mem(" Received Data: ", (char *)smb_buffer, |
475 | length); | |
46810cbf SF |
476 | cifs_reconnect(server); |
477 | csocket = server->ssocket; | |
478 | continue; | |
e4eb295d SF |
479 | } |
480 | ||
481 | /* else we have an SMB response */ | |
fb8c4b14 | 482 | if ((pdu_length > CIFSMaxBufSize + MAX_CIFS_HDR_SIZE - 4) || |
26f57364 | 483 | (pdu_length < sizeof(struct smb_hdr) - 1 - 4)) { |
b6b38f70 JP |
484 | cERROR(1, "Invalid size SMB length %d pdu_length %d", |
485 | length, pdu_length+4); | |
e4eb295d SF |
486 | cifs_reconnect(server); |
487 | csocket = server->ssocket; | |
488 | wake_up(&server->response_q); | |
489 | continue; | |
fb8c4b14 | 490 | } |
e4eb295d SF |
491 | |
492 | /* else length ok */ | |
493 | reconnect = 0; | |
494 | ||
fb8c4b14 | 495 | if (pdu_length > MAX_CIFS_SMALL_BUFFER_SIZE - 4) { |
4b18f2a9 | 496 | isLargeBuf = true; |
e4eb295d SF |
497 | memcpy(bigbuf, smallbuf, 4); |
498 | smb_buffer = bigbuf; | |
499 | } | |
500 | length = 0; | |
501 | iov.iov_base = 4 + (char *)smb_buffer; | |
502 | iov.iov_len = pdu_length; | |
fb8c4b14 | 503 | for (total_read = 0; total_read < pdu_length; |
e4eb295d SF |
504 | total_read += length) { |
505 | length = kernel_recvmsg(csocket, &smb_msg, &iov, 1, | |
506 | pdu_length - total_read, 0); | |
522bbe65 | 507 | if (server->tcpStatus == CifsExiting) { |
e4eb295d SF |
508 | /* then will exit */ |
509 | reconnect = 2; | |
510 | break; | |
511 | } else if (server->tcpStatus == CifsNeedReconnect) { | |
46810cbf SF |
512 | cifs_reconnect(server); |
513 | csocket = server->ssocket; | |
fb8c4b14 | 514 | /* Reconnect wakes up rspns q */ |
e4eb295d SF |
515 | /* Now we will reread sock */ |
516 | reconnect = 1; | |
517 | break; | |
522bbe65 JL |
518 | } else if (length == -ERESTARTSYS || |
519 | length == -EAGAIN || | |
520 | length == -EINTR) { | |
e4eb295d | 521 | msleep(1); /* minimum sleep to prevent looping, |
fb8c4b14 | 522 | allowing socket to clear and app |
e4eb295d SF |
523 | threads to set tcpStatus |
524 | CifsNeedReconnect if server hung*/ | |
c18c732e | 525 | length = 0; |
46810cbf | 526 | continue; |
e4eb295d | 527 | } else if (length <= 0) { |
b6b38f70 JP |
528 | cERROR(1, "Received no data, expecting %d", |
529 | pdu_length - total_read); | |
e4eb295d SF |
530 | cifs_reconnect(server); |
531 | csocket = server->ssocket; | |
532 | reconnect = 1; | |
533 | break; | |
46810cbf | 534 | } |
e4eb295d | 535 | } |
fb8c4b14 | 536 | if (reconnect == 2) |
e4eb295d | 537 | break; |
fb8c4b14 | 538 | else if (reconnect == 1) |
e4eb295d | 539 | continue; |
1da177e4 | 540 | |
e4eb295d | 541 | length += 4; /* account for rfc1002 hdr */ |
50c2f753 | 542 | |
09d1db5c | 543 | |
e4eb295d | 544 | dump_smb(smb_buffer, length); |
184ed211 | 545 | if (checkSMB(smb_buffer, smb_buffer->Mid, total_read+4)) { |
b387eaeb | 546 | cifs_dump_mem("Bad SMB: ", smb_buffer, 48); |
e4eb295d SF |
547 | continue; |
548 | } | |
1da177e4 | 549 | |
e4eb295d SF |
550 | |
551 | task_to_wake = NULL; | |
552 | spin_lock(&GlobalMid_Lock); | |
553 | list_for_each(tmp, &server->pending_mid_q) { | |
554 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
555 | ||
50c2f753 | 556 | if ((mid_entry->mid == smb_buffer->Mid) && |
e4eb295d SF |
557 | (mid_entry->midState == MID_REQUEST_SUBMITTED) && |
558 | (mid_entry->command == smb_buffer->Command)) { | |
fb8c4b14 | 559 | if (check2ndT2(smb_buffer,server->maxBuf) > 0) { |
e4eb295d | 560 | /* We have a multipart transact2 resp */ |
4b18f2a9 | 561 | isMultiRsp = true; |
fb8c4b14 | 562 | if (mid_entry->resp_buf) { |
e4eb295d | 563 | /* merge response - fix up 1st*/ |
50c2f753 | 564 | if (coalesce_t2(smb_buffer, |
e4eb295d | 565 | mid_entry->resp_buf)) { |
4b18f2a9 SF |
566 | mid_entry->multiRsp = |
567 | true; | |
e4eb295d SF |
568 | break; |
569 | } else { | |
570 | /* all parts received */ | |
4b18f2a9 SF |
571 | mid_entry->multiEnd = |
572 | true; | |
50c2f753 | 573 | goto multi_t2_fnd; |
e4eb295d SF |
574 | } |
575 | } else { | |
fb8c4b14 | 576 | if (!isLargeBuf) { |
b6b38f70 | 577 | cERROR(1, "1st trans2 resp needs bigbuf"); |
e4eb295d | 578 | /* BB maybe we can fix this up, switch |
50c2f753 | 579 | to already allocated large buffer? */ |
e4eb295d | 580 | } else { |
cd63499c | 581 | /* Have first buffer */ |
e4eb295d SF |
582 | mid_entry->resp_buf = |
583 | smb_buffer; | |
4b18f2a9 SF |
584 | mid_entry->largeBuf = |
585 | true; | |
e4eb295d SF |
586 | bigbuf = NULL; |
587 | } | |
588 | } | |
589 | break; | |
50c2f753 | 590 | } |
e4eb295d | 591 | mid_entry->resp_buf = smb_buffer; |
4b18f2a9 | 592 | mid_entry->largeBuf = isLargeBuf; |
e4eb295d SF |
593 | multi_t2_fnd: |
594 | task_to_wake = mid_entry->tsk; | |
595 | mid_entry->midState = MID_RESPONSE_RECEIVED; | |
1047abc1 SF |
596 | #ifdef CONFIG_CIFS_STATS2 |
597 | mid_entry->when_received = jiffies; | |
598 | #endif | |
3a5ff61c SF |
599 | /* so we do not time out requests to server |
600 | which is still responding (since server could | |
601 | be busy but not dead) */ | |
602 | server->lstrp = jiffies; | |
e4eb295d | 603 | break; |
46810cbf | 604 | } |
1da177e4 | 605 | } |
e4eb295d SF |
606 | spin_unlock(&GlobalMid_Lock); |
607 | if (task_to_wake) { | |
cd63499c | 608 | /* Was previous buf put in mpx struct for multi-rsp? */ |
fb8c4b14 | 609 | if (!isMultiRsp) { |
cd63499c | 610 | /* smb buffer will be freed by user thread */ |
26f57364 | 611 | if (isLargeBuf) |
cd63499c | 612 | bigbuf = NULL; |
26f57364 | 613 | else |
cd63499c SF |
614 | smallbuf = NULL; |
615 | } | |
e4eb295d | 616 | wake_up_process(task_to_wake); |
4b18f2a9 SF |
617 | } else if (!is_valid_oplock_break(smb_buffer, server) && |
618 | !isMultiRsp) { | |
b6b38f70 JP |
619 | cERROR(1, "No task to wake, unknown frame received! " |
620 | "NumMids %d", midCount.counter); | |
50c2f753 | 621 | cifs_dump_mem("Received Data is: ", (char *)smb_buffer, |
70ca734a | 622 | sizeof(struct smb_hdr)); |
3979877e SF |
623 | #ifdef CONFIG_CIFS_DEBUG2 |
624 | cifs_dump_detail(smb_buffer); | |
625 | cifs_dump_mids(server); | |
626 | #endif /* CIFS_DEBUG2 */ | |
50c2f753 | 627 | |
e4eb295d SF |
628 | } |
629 | } /* end while !EXITING */ | |
630 | ||
e7ddee90 JL |
631 | /* take it off the list, if it's not already */ |
632 | write_lock(&cifs_tcp_ses_lock); | |
633 | list_del_init(&server->tcp_ses_list); | |
634 | write_unlock(&cifs_tcp_ses_lock); | |
635 | ||
1da177e4 LT |
636 | spin_lock(&GlobalMid_Lock); |
637 | server->tcpStatus = CifsExiting; | |
e691b9d1 | 638 | spin_unlock(&GlobalMid_Lock); |
dbdbb876 | 639 | wake_up_all(&server->response_q); |
e691b9d1 | 640 | |
31ca3bc3 SF |
641 | /* check if we have blocked requests that need to free */ |
642 | /* Note that cifs_max_pending is normally 50, but | |
643 | can be set at module install time to as little as two */ | |
e691b9d1 | 644 | spin_lock(&GlobalMid_Lock); |
fb8c4b14 | 645 | if (atomic_read(&server->inFlight) >= cifs_max_pending) |
31ca3bc3 SF |
646 | atomic_set(&server->inFlight, cifs_max_pending - 1); |
647 | /* We do not want to set the max_pending too low or we | |
648 | could end up with the counter going negative */ | |
1da177e4 | 649 | spin_unlock(&GlobalMid_Lock); |
50c2f753 | 650 | /* Although there should not be any requests blocked on |
1da177e4 | 651 | this queue it can not hurt to be paranoid and try to wake up requests |
09d1db5c | 652 | that may haven been blocked when more than 50 at time were on the wire |
1da177e4 LT |
653 | to the same server - they now will see the session is in exit state |
654 | and get out of SendReceive. */ | |
655 | wake_up_all(&server->request_q); | |
656 | /* give those requests time to exit */ | |
b8643e1b | 657 | msleep(125); |
50c2f753 | 658 | |
fb8c4b14 | 659 | if (server->ssocket) { |
1da177e4 LT |
660 | sock_release(csocket); |
661 | server->ssocket = NULL; | |
662 | } | |
b8643e1b | 663 | /* buffer usuallly freed in free_mid - need to free it here on exit */ |
a8a11d39 MK |
664 | cifs_buf_release(bigbuf); |
665 | if (smallbuf) /* no sense logging a debug message if NULL */ | |
b8643e1b | 666 | cifs_small_buf_release(smallbuf); |
1da177e4 | 667 | |
14fbf50d JL |
668 | /* |
669 | * BB: we shouldn't have to do any of this. It shouldn't be | |
670 | * possible to exit from the thread with active SMB sessions | |
671 | */ | |
672 | read_lock(&cifs_tcp_ses_lock); | |
1da177e4 | 673 | if (list_empty(&server->pending_mid_q)) { |
09d1db5c SF |
674 | /* loop through server session structures attached to this and |
675 | mark them dead */ | |
14fbf50d JL |
676 | list_for_each(tmp, &server->smb_ses_list) { |
677 | ses = list_entry(tmp, struct cifsSesInfo, | |
678 | smb_ses_list); | |
679 | ses->status = CifsExiting; | |
680 | ses->server = NULL; | |
1da177e4 | 681 | } |
14fbf50d | 682 | read_unlock(&cifs_tcp_ses_lock); |
1da177e4 | 683 | } else { |
31ca3bc3 SF |
684 | /* although we can not zero the server struct pointer yet, |
685 | since there are active requests which may depnd on them, | |
686 | mark the corresponding SMB sessions as exiting too */ | |
14fbf50d | 687 | list_for_each(tmp, &server->smb_ses_list) { |
31ca3bc3 | 688 | ses = list_entry(tmp, struct cifsSesInfo, |
14fbf50d JL |
689 | smb_ses_list); |
690 | ses->status = CifsExiting; | |
31ca3bc3 SF |
691 | } |
692 | ||
1da177e4 LT |
693 | spin_lock(&GlobalMid_Lock); |
694 | list_for_each(tmp, &server->pending_mid_q) { | |
695 | mid_entry = list_entry(tmp, struct mid_q_entry, qhead); | |
696 | if (mid_entry->midState == MID_REQUEST_SUBMITTED) { | |
b6b38f70 JP |
697 | cFYI(1, "Clearing Mid 0x%x - waking up ", |
698 | mid_entry->mid); | |
1da177e4 | 699 | task_to_wake = mid_entry->tsk; |
26f57364 | 700 | if (task_to_wake) |
1da177e4 | 701 | wake_up_process(task_to_wake); |
1da177e4 LT |
702 | } |
703 | } | |
704 | spin_unlock(&GlobalMid_Lock); | |
14fbf50d | 705 | read_unlock(&cifs_tcp_ses_lock); |
1da177e4 | 706 | /* 1/8th of sec is more than enough time for them to exit */ |
b8643e1b | 707 | msleep(125); |
1da177e4 LT |
708 | } |
709 | ||
f191401f | 710 | if (!list_empty(&server->pending_mid_q)) { |
50c2f753 | 711 | /* mpx threads have not exited yet give them |
1da177e4 | 712 | at least the smb send timeout time for long ops */ |
31ca3bc3 SF |
713 | /* due to delays on oplock break requests, we need |
714 | to wait at least 45 seconds before giving up | |
715 | on a request getting a response and going ahead | |
716 | and killing cifsd */ | |
b6b38f70 | 717 | cFYI(1, "Wait for exit from demultiplex thread"); |
31ca3bc3 | 718 | msleep(46000); |
1da177e4 LT |
719 | /* if threads still have not exited they are probably never |
720 | coming home not much else we can do but free the memory */ | |
721 | } | |
1da177e4 | 722 | |
31ca3bc3 SF |
723 | /* last chance to mark ses pointers invalid |
724 | if there are any pointing to this (e.g | |
50c2f753 | 725 | if a crazy root user tried to kill cifsd |
31ca3bc3 | 726 | kernel thread explicitly this might happen) */ |
14fbf50d JL |
727 | /* BB: This shouldn't be necessary, see above */ |
728 | read_lock(&cifs_tcp_ses_lock); | |
729 | list_for_each(tmp, &server->smb_ses_list) { | |
730 | ses = list_entry(tmp, struct cifsSesInfo, smb_ses_list); | |
731 | ses->server = NULL; | |
31ca3bc3 | 732 | } |
14fbf50d | 733 | read_unlock(&cifs_tcp_ses_lock); |
31ca3bc3 | 734 | |
c359cf3c | 735 | kfree(server->hostname); |
b1c8d2b4 | 736 | task_to_wake = xchg(&server->tsk, NULL); |
31ca3bc3 | 737 | kfree(server); |
93d0ec85 JL |
738 | |
739 | length = atomic_dec_return(&tcpSesAllocCount); | |
26f57364 SF |
740 | if (length > 0) |
741 | mempool_resize(cifs_req_poolp, length + cifs_min_rcv, | |
742 | GFP_KERNEL); | |
50c2f753 | 743 | |
b1c8d2b4 JL |
744 | /* if server->tsk was NULL then wait for a signal before exiting */ |
745 | if (!task_to_wake) { | |
746 | set_current_state(TASK_INTERRUPTIBLE); | |
747 | while (!signal_pending(current)) { | |
748 | schedule(); | |
749 | set_current_state(TASK_INTERRUPTIBLE); | |
750 | } | |
751 | set_current_state(TASK_RUNNING); | |
752 | } | |
753 | ||
0468a2cf | 754 | module_put_and_exit(0); |
1da177e4 LT |
755 | } |
756 | ||
c359cf3c JL |
757 | /* extract the host portion of the UNC string */ |
758 | static char * | |
759 | extract_hostname(const char *unc) | |
760 | { | |
761 | const char *src; | |
762 | char *dst, *delim; | |
763 | unsigned int len; | |
764 | ||
765 | /* skip double chars at beginning of string */ | |
766 | /* BB: check validity of these bytes? */ | |
767 | src = unc + 2; | |
768 | ||
769 | /* delimiter between hostname and sharename is always '\\' now */ | |
770 | delim = strchr(src, '\\'); | |
771 | if (!delim) | |
772 | return ERR_PTR(-EINVAL); | |
773 | ||
774 | len = delim - src; | |
775 | dst = kmalloc((len + 1), GFP_KERNEL); | |
776 | if (dst == NULL) | |
777 | return ERR_PTR(-ENOMEM); | |
778 | ||
779 | memcpy(dst, src, len); | |
780 | dst[len] = '\0'; | |
781 | ||
782 | return dst; | |
783 | } | |
784 | ||
1da177e4 | 785 | static int |
50c2f753 SF |
786 | cifs_parse_mount_options(char *options, const char *devname, |
787 | struct smb_vol *vol) | |
1da177e4 LT |
788 | { |
789 | char *value; | |
790 | char *data; | |
791 | unsigned int temp_len, i, j; | |
792 | char separator[2]; | |
9b9d6b24 JL |
793 | short int override_uid = -1; |
794 | short int override_gid = -1; | |
795 | bool uid_specified = false; | |
796 | bool gid_specified = false; | |
1da177e4 LT |
797 | |
798 | separator[0] = ','; | |
50c2f753 | 799 | separator[1] = 0; |
1da177e4 | 800 | |
12e36b2f | 801 | if (Local_System_Name[0] != 0) |
50c2f753 | 802 | memcpy(vol->source_rfc1001_name, Local_System_Name, 15); |
2cd646a2 | 803 | else { |
12e36b2f | 804 | char *nodename = utsname()->nodename; |
50c2f753 SF |
805 | int n = strnlen(nodename, 15); |
806 | memset(vol->source_rfc1001_name, 0x20, 15); | |
807 | for (i = 0; i < n; i++) { | |
2cd646a2 SF |
808 | /* does not have to be perfect mapping since field is |
809 | informational, only used for servers that do not support | |
810 | port 445 and it can be overridden at mount time */ | |
12e36b2f | 811 | vol->source_rfc1001_name[i] = toupper(nodename[i]); |
2cd646a2 | 812 | } |
1da177e4 LT |
813 | } |
814 | vol->source_rfc1001_name[15] = 0; | |
a10faeb2 SF |
815 | /* null target name indicates to use *SMBSERVR default called name |
816 | if we end up sending RFC1001 session initialize */ | |
817 | vol->target_rfc1001_name[0] = 0; | |
3e4b3e1f JL |
818 | vol->cred_uid = current_uid(); |
819 | vol->linux_uid = current_uid(); | |
a001e5b5 | 820 | vol->linux_gid = current_gid(); |
f55ed1a8 JL |
821 | |
822 | /* default to only allowing write access to owner of the mount */ | |
823 | vol->dir_mode = vol->file_mode = S_IRUGO | S_IXUGO | S_IWUSR; | |
1da177e4 LT |
824 | |
825 | /* vol->retry default is 0 (i.e. "soft" limited retry not hard retry) */ | |
ac67055e JA |
826 | /* default is always to request posix paths. */ |
827 | vol->posix_paths = 1; | |
a0c9217f JL |
828 | /* default to using server inode numbers where available */ |
829 | vol->server_ino = 1; | |
ac67055e | 830 | |
1da177e4 LT |
831 | if (!options) |
832 | return 1; | |
833 | ||
50c2f753 | 834 | if (strncmp(options, "sep=", 4) == 0) { |
fb8c4b14 | 835 | if (options[4] != 0) { |
1da177e4 LT |
836 | separator[0] = options[4]; |
837 | options += 5; | |
838 | } else { | |
b6b38f70 | 839 | cFYI(1, "Null separator not allowed"); |
1da177e4 LT |
840 | } |
841 | } | |
50c2f753 | 842 | |
1da177e4 LT |
843 | while ((data = strsep(&options, separator)) != NULL) { |
844 | if (!*data) | |
845 | continue; | |
846 | if ((value = strchr(data, '=')) != NULL) | |
847 | *value++ = '\0'; | |
848 | ||
50c2f753 SF |
849 | /* Have to parse this before we parse for "user" */ |
850 | if (strnicmp(data, "user_xattr", 10) == 0) { | |
1da177e4 | 851 | vol->no_xattr = 0; |
50c2f753 | 852 | } else if (strnicmp(data, "nouser_xattr", 12) == 0) { |
1da177e4 LT |
853 | vol->no_xattr = 1; |
854 | } else if (strnicmp(data, "user", 4) == 0) { | |
4b952a9b | 855 | if (!value) { |
1da177e4 LT |
856 | printk(KERN_WARNING |
857 | "CIFS: invalid or missing username\n"); | |
858 | return 1; /* needs_arg; */ | |
fb8c4b14 | 859 | } else if (!*value) { |
4b952a9b SF |
860 | /* null user, ie anonymous, authentication */ |
861 | vol->nullauth = 1; | |
1da177e4 LT |
862 | } |
863 | if (strnlen(value, 200) < 200) { | |
864 | vol->username = value; | |
865 | } else { | |
866 | printk(KERN_WARNING "CIFS: username too long\n"); | |
867 | return 1; | |
868 | } | |
869 | } else if (strnicmp(data, "pass", 4) == 0) { | |
870 | if (!value) { | |
871 | vol->password = NULL; | |
872 | continue; | |
fb8c4b14 | 873 | } else if (value[0] == 0) { |
1da177e4 LT |
874 | /* check if string begins with double comma |
875 | since that would mean the password really | |
876 | does start with a comma, and would not | |
877 | indicate an empty string */ | |
fb8c4b14 | 878 | if (value[1] != separator[0]) { |
1da177e4 LT |
879 | vol->password = NULL; |
880 | continue; | |
881 | } | |
882 | } | |
883 | temp_len = strlen(value); | |
884 | /* removed password length check, NTLM passwords | |
885 | can be arbitrarily long */ | |
886 | ||
50c2f753 | 887 | /* if comma in password, the string will be |
1da177e4 LT |
888 | prematurely null terminated. Commas in password are |
889 | specified across the cifs mount interface by a double | |
890 | comma ie ,, and a comma used as in other cases ie ',' | |
891 | as a parameter delimiter/separator is single and due | |
892 | to the strsep above is temporarily zeroed. */ | |
893 | ||
894 | /* NB: password legally can have multiple commas and | |
895 | the only illegal character in a password is null */ | |
896 | ||
50c2f753 | 897 | if ((value[temp_len] == 0) && |
09d1db5c | 898 | (value[temp_len+1] == separator[0])) { |
1da177e4 LT |
899 | /* reinsert comma */ |
900 | value[temp_len] = separator[0]; | |
50c2f753 SF |
901 | temp_len += 2; /* move after second comma */ |
902 | while (value[temp_len] != 0) { | |
1da177e4 | 903 | if (value[temp_len] == separator[0]) { |
50c2f753 | 904 | if (value[temp_len+1] == |
09d1db5c SF |
905 | separator[0]) { |
906 | /* skip second comma */ | |
907 | temp_len++; | |
50c2f753 | 908 | } else { |
1da177e4 LT |
909 | /* single comma indicating start |
910 | of next parm */ | |
911 | break; | |
912 | } | |
913 | } | |
914 | temp_len++; | |
915 | } | |
fb8c4b14 | 916 | if (value[temp_len] == 0) { |
1da177e4 LT |
917 | options = NULL; |
918 | } else { | |
919 | value[temp_len] = 0; | |
920 | /* point option to start of next parm */ | |
921 | options = value + temp_len + 1; | |
922 | } | |
50c2f753 | 923 | /* go from value to value + temp_len condensing |
1da177e4 LT |
924 | double commas to singles. Note that this ends up |
925 | allocating a few bytes too many, which is ok */ | |
e915fc49 | 926 | vol->password = kzalloc(temp_len, GFP_KERNEL); |
fb8c4b14 | 927 | if (vol->password == NULL) { |
50c2f753 SF |
928 | printk(KERN_WARNING "CIFS: no memory " |
929 | "for password\n"); | |
433dc24f SF |
930 | return 1; |
931 | } | |
50c2f753 | 932 | for (i = 0, j = 0; i < temp_len; i++, j++) { |
1da177e4 | 933 | vol->password[j] = value[i]; |
fb8c4b14 | 934 | if (value[i] == separator[0] |
09d1db5c | 935 | && value[i+1] == separator[0]) { |
1da177e4 LT |
936 | /* skip second comma */ |
937 | i++; | |
938 | } | |
939 | } | |
940 | vol->password[j] = 0; | |
941 | } else { | |
e915fc49 | 942 | vol->password = kzalloc(temp_len+1, GFP_KERNEL); |
fb8c4b14 | 943 | if (vol->password == NULL) { |
50c2f753 SF |
944 | printk(KERN_WARNING "CIFS: no memory " |
945 | "for password\n"); | |
433dc24f SF |
946 | return 1; |
947 | } | |
1da177e4 LT |
948 | strcpy(vol->password, value); |
949 | } | |
58f7f68f JL |
950 | } else if (!strnicmp(data, "ip", 2) || |
951 | !strnicmp(data, "addr", 4)) { | |
1da177e4 LT |
952 | if (!value || !*value) { |
953 | vol->UNCip = NULL; | |
50b64e3b JL |
954 | } else if (strnlen(value, INET6_ADDRSTRLEN) < |
955 | INET6_ADDRSTRLEN) { | |
1da177e4 LT |
956 | vol->UNCip = value; |
957 | } else { | |
50c2f753 SF |
958 | printk(KERN_WARNING "CIFS: ip address " |
959 | "too long\n"); | |
1da177e4 LT |
960 | return 1; |
961 | } | |
50c2f753 SF |
962 | } else if (strnicmp(data, "sec", 3) == 0) { |
963 | if (!value || !*value) { | |
b6b38f70 | 964 | cERROR(1, "no security value specified"); |
50c2f753 SF |
965 | continue; |
966 | } else if (strnicmp(value, "krb5i", 5) == 0) { | |
967 | vol->secFlg |= CIFSSEC_MAY_KRB5 | | |
189acaae | 968 | CIFSSEC_MUST_SIGN; |
bf820679 | 969 | } else if (strnicmp(value, "krb5p", 5) == 0) { |
50c2f753 SF |
970 | /* vol->secFlg |= CIFSSEC_MUST_SEAL | |
971 | CIFSSEC_MAY_KRB5; */ | |
b6b38f70 | 972 | cERROR(1, "Krb5 cifs privacy not supported"); |
bf820679 SF |
973 | return 1; |
974 | } else if (strnicmp(value, "krb5", 4) == 0) { | |
750d1151 | 975 | vol->secFlg |= CIFSSEC_MAY_KRB5; |
ac683924 SF |
976 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
977 | } else if (strnicmp(value, "ntlmsspi", 8) == 0) { | |
978 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP | | |
979 | CIFSSEC_MUST_SIGN; | |
980 | } else if (strnicmp(value, "ntlmssp", 7) == 0) { | |
981 | vol->secFlg |= CIFSSEC_MAY_NTLMSSP; | |
982 | #endif | |
bf820679 | 983 | } else if (strnicmp(value, "ntlmv2i", 7) == 0) { |
750d1151 | 984 | vol->secFlg |= CIFSSEC_MAY_NTLMV2 | |
189acaae | 985 | CIFSSEC_MUST_SIGN; |
bf820679 | 986 | } else if (strnicmp(value, "ntlmv2", 6) == 0) { |
750d1151 | 987 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
bf820679 | 988 | } else if (strnicmp(value, "ntlmi", 5) == 0) { |
750d1151 | 989 | vol->secFlg |= CIFSSEC_MAY_NTLM | |
189acaae | 990 | CIFSSEC_MUST_SIGN; |
bf820679 SF |
991 | } else if (strnicmp(value, "ntlm", 4) == 0) { |
992 | /* ntlm is default so can be turned off too */ | |
750d1151 | 993 | vol->secFlg |= CIFSSEC_MAY_NTLM; |
bf820679 | 994 | } else if (strnicmp(value, "nontlm", 6) == 0) { |
189acaae | 995 | /* BB is there a better way to do this? */ |
750d1151 | 996 | vol->secFlg |= CIFSSEC_MAY_NTLMV2; |
189acaae SF |
997 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
998 | } else if (strnicmp(value, "lanman", 6) == 0) { | |
50c2f753 | 999 | vol->secFlg |= CIFSSEC_MAY_LANMAN; |
189acaae | 1000 | #endif |
bf820679 | 1001 | } else if (strnicmp(value, "none", 4) == 0) { |
189acaae | 1002 | vol->nullauth = 1; |
50c2f753 | 1003 | } else { |
b6b38f70 | 1004 | cERROR(1, "bad security option: %s", value); |
50c2f753 SF |
1005 | return 1; |
1006 | } | |
1da177e4 LT |
1007 | } else if ((strnicmp(data, "unc", 3) == 0) |
1008 | || (strnicmp(data, "target", 6) == 0) | |
1009 | || (strnicmp(data, "path", 4) == 0)) { | |
1010 | if (!value || !*value) { | |
50c2f753 SF |
1011 | printk(KERN_WARNING "CIFS: invalid path to " |
1012 | "network resource\n"); | |
1da177e4 LT |
1013 | return 1; /* needs_arg; */ |
1014 | } | |
1015 | if ((temp_len = strnlen(value, 300)) < 300) { | |
50c2f753 | 1016 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1017 | if (vol->UNC == NULL) |
1da177e4 | 1018 | return 1; |
50c2f753 | 1019 | strcpy(vol->UNC, value); |
1da177e4 LT |
1020 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1021 | vol->UNC[0] = '\\'; | |
1022 | vol->UNC[1] = '\\'; | |
50c2f753 | 1023 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { |
1da177e4 | 1024 | printk(KERN_WARNING |
50c2f753 SF |
1025 | "CIFS: UNC Path does not begin " |
1026 | "with // or \\\\ \n"); | |
1da177e4 LT |
1027 | return 1; |
1028 | } | |
1029 | } else { | |
1030 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1031 | return 1; | |
1032 | } | |
1033 | } else if ((strnicmp(data, "domain", 3) == 0) | |
1034 | || (strnicmp(data, "workgroup", 5) == 0)) { | |
1035 | if (!value || !*value) { | |
1036 | printk(KERN_WARNING "CIFS: invalid domain name\n"); | |
1037 | return 1; /* needs_arg; */ | |
1038 | } | |
1039 | /* BB are there cases in which a comma can be valid in | |
1040 | a domain name and need special handling? */ | |
3979877e | 1041 | if (strnlen(value, 256) < 256) { |
1da177e4 | 1042 | vol->domainname = value; |
b6b38f70 | 1043 | cFYI(1, "Domain name set"); |
1da177e4 | 1044 | } else { |
50c2f753 SF |
1045 | printk(KERN_WARNING "CIFS: domain name too " |
1046 | "long\n"); | |
1da177e4 LT |
1047 | return 1; |
1048 | } | |
50c2f753 SF |
1049 | } else if (strnicmp(data, "prefixpath", 10) == 0) { |
1050 | if (!value || !*value) { | |
1051 | printk(KERN_WARNING | |
1052 | "CIFS: invalid path prefix\n"); | |
1053 | return 1; /* needs_argument */ | |
1054 | } | |
1055 | if ((temp_len = strnlen(value, 1024)) < 1024) { | |
4523cc30 | 1056 | if (value[0] != '/') |
2fe87f02 | 1057 | temp_len++; /* missing leading slash */ |
50c2f753 SF |
1058 | vol->prepath = kmalloc(temp_len+1, GFP_KERNEL); |
1059 | if (vol->prepath == NULL) | |
1060 | return 1; | |
4523cc30 | 1061 | if (value[0] != '/') { |
2fe87f02 | 1062 | vol->prepath[0] = '/'; |
50c2f753 | 1063 | strcpy(vol->prepath+1, value); |
2fe87f02 | 1064 | } else |
50c2f753 | 1065 | strcpy(vol->prepath, value); |
b6b38f70 | 1066 | cFYI(1, "prefix path %s", vol->prepath); |
50c2f753 SF |
1067 | } else { |
1068 | printk(KERN_WARNING "CIFS: prefix too long\n"); | |
1069 | return 1; | |
1070 | } | |
1da177e4 LT |
1071 | } else if (strnicmp(data, "iocharset", 9) == 0) { |
1072 | if (!value || !*value) { | |
63135e08 SF |
1073 | printk(KERN_WARNING "CIFS: invalid iocharset " |
1074 | "specified\n"); | |
1da177e4 LT |
1075 | return 1; /* needs_arg; */ |
1076 | } | |
1077 | if (strnlen(value, 65) < 65) { | |
50c2f753 | 1078 | if (strnicmp(value, "default", 7)) |
1da177e4 | 1079 | vol->iocharset = value; |
50c2f753 SF |
1080 | /* if iocharset not set then load_nls_default |
1081 | is used by caller */ | |
b6b38f70 | 1082 | cFYI(1, "iocharset set to %s", value); |
1da177e4 | 1083 | } else { |
63135e08 SF |
1084 | printk(KERN_WARNING "CIFS: iocharset name " |
1085 | "too long.\n"); | |
1da177e4 LT |
1086 | return 1; |
1087 | } | |
9b9d6b24 JL |
1088 | } else if (!strnicmp(data, "uid", 3) && value && *value) { |
1089 | vol->linux_uid = simple_strtoul(value, &value, 0); | |
1090 | uid_specified = true; | |
1091 | } else if (!strnicmp(data, "forceuid", 8)) { | |
1092 | override_uid = 1; | |
1093 | } else if (!strnicmp(data, "noforceuid", 10)) { | |
1094 | override_uid = 0; | |
1095 | } else if (!strnicmp(data, "gid", 3) && value && *value) { | |
1096 | vol->linux_gid = simple_strtoul(value, &value, 0); | |
1097 | gid_specified = true; | |
1098 | } else if (!strnicmp(data, "forcegid", 8)) { | |
1099 | override_gid = 1; | |
1100 | } else if (!strnicmp(data, "noforcegid", 10)) { | |
1101 | override_gid = 0; | |
1da177e4 LT |
1102 | } else if (strnicmp(data, "file_mode", 4) == 0) { |
1103 | if (value && *value) { | |
1104 | vol->file_mode = | |
1105 | simple_strtoul(value, &value, 0); | |
1106 | } | |
1107 | } else if (strnicmp(data, "dir_mode", 4) == 0) { | |
1108 | if (value && *value) { | |
1109 | vol->dir_mode = | |
1110 | simple_strtoul(value, &value, 0); | |
1111 | } | |
1112 | } else if (strnicmp(data, "dirmode", 4) == 0) { | |
1113 | if (value && *value) { | |
1114 | vol->dir_mode = | |
1115 | simple_strtoul(value, &value, 0); | |
1116 | } | |
1117 | } else if (strnicmp(data, "port", 4) == 0) { | |
1118 | if (value && *value) { | |
1119 | vol->port = | |
1120 | simple_strtoul(value, &value, 0); | |
1121 | } | |
1122 | } else if (strnicmp(data, "rsize", 5) == 0) { | |
1123 | if (value && *value) { | |
1124 | vol->rsize = | |
1125 | simple_strtoul(value, &value, 0); | |
1126 | } | |
1127 | } else if (strnicmp(data, "wsize", 5) == 0) { | |
1128 | if (value && *value) { | |
1129 | vol->wsize = | |
1130 | simple_strtoul(value, &value, 0); | |
1131 | } | |
1132 | } else if (strnicmp(data, "sockopt", 5) == 0) { | |
6a5fa236 | 1133 | if (!value || !*value) { |
b6b38f70 | 1134 | cERROR(1, "no socket option specified"); |
6a5fa236 SF |
1135 | continue; |
1136 | } else if (strnicmp(value, "TCP_NODELAY", 11) == 0) { | |
1137 | vol->sockopt_tcp_nodelay = 1; | |
1da177e4 LT |
1138 | } |
1139 | } else if (strnicmp(data, "netbiosname", 4) == 0) { | |
1140 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1141 | cFYI(1, "invalid (empty) netbiosname"); |
1da177e4 | 1142 | } else { |
50c2f753 SF |
1143 | memset(vol->source_rfc1001_name, 0x20, 15); |
1144 | for (i = 0; i < 15; i++) { | |
1145 | /* BB are there cases in which a comma can be | |
1da177e4 LT |
1146 | valid in this workstation netbios name (and need |
1147 | special handling)? */ | |
1148 | ||
1149 | /* We do not uppercase netbiosname for user */ | |
50c2f753 | 1150 | if (value[i] == 0) |
1da177e4 | 1151 | break; |
50c2f753 SF |
1152 | else |
1153 | vol->source_rfc1001_name[i] = | |
1154 | value[i]; | |
1da177e4 LT |
1155 | } |
1156 | /* The string has 16th byte zero still from | |
1157 | set at top of the function */ | |
50c2f753 SF |
1158 | if ((i == 15) && (value[i] != 0)) |
1159 | printk(KERN_WARNING "CIFS: netbiosname" | |
1160 | " longer than 15 truncated.\n"); | |
a10faeb2 SF |
1161 | } |
1162 | } else if (strnicmp(data, "servern", 7) == 0) { | |
1163 | /* servernetbiosname specified override *SMBSERVER */ | |
1164 | if (!value || !*value || (*value == ' ')) { | |
b6b38f70 | 1165 | cFYI(1, "empty server netbiosname specified"); |
a10faeb2 SF |
1166 | } else { |
1167 | /* last byte, type, is 0x20 for servr type */ | |
50c2f753 | 1168 | memset(vol->target_rfc1001_name, 0x20, 16); |
a10faeb2 | 1169 | |
50c2f753 | 1170 | for (i = 0; i < 15; i++) { |
a10faeb2 | 1171 | /* BB are there cases in which a comma can be |
50c2f753 SF |
1172 | valid in this workstation netbios name |
1173 | (and need special handling)? */ | |
a10faeb2 | 1174 | |
50c2f753 SF |
1175 | /* user or mount helper must uppercase |
1176 | the netbiosname */ | |
1177 | if (value[i] == 0) | |
a10faeb2 SF |
1178 | break; |
1179 | else | |
50c2f753 SF |
1180 | vol->target_rfc1001_name[i] = |
1181 | value[i]; | |
a10faeb2 SF |
1182 | } |
1183 | /* The string has 16th byte zero still from | |
1184 | set at top of the function */ | |
50c2f753 SF |
1185 | if ((i == 15) && (value[i] != 0)) |
1186 | printk(KERN_WARNING "CIFS: server net" | |
1187 | "biosname longer than 15 truncated.\n"); | |
1da177e4 LT |
1188 | } |
1189 | } else if (strnicmp(data, "credentials", 4) == 0) { | |
1190 | /* ignore */ | |
1191 | } else if (strnicmp(data, "version", 3) == 0) { | |
1192 | /* ignore */ | |
50c2f753 | 1193 | } else if (strnicmp(data, "guest", 5) == 0) { |
1da177e4 | 1194 | /* ignore */ |
71a394fa SF |
1195 | } else if (strnicmp(data, "rw", 2) == 0) { |
1196 | /* ignore */ | |
1197 | } else if (strnicmp(data, "ro", 2) == 0) { | |
1198 | /* ignore */ | |
edf1ae40 SF |
1199 | } else if (strnicmp(data, "noblocksend", 11) == 0) { |
1200 | vol->noblocksnd = 1; | |
1201 | } else if (strnicmp(data, "noautotune", 10) == 0) { | |
1202 | vol->noautotune = 1; | |
1da177e4 LT |
1203 | } else if ((strnicmp(data, "suid", 4) == 0) || |
1204 | (strnicmp(data, "nosuid", 6) == 0) || | |
1205 | (strnicmp(data, "exec", 4) == 0) || | |
1206 | (strnicmp(data, "noexec", 6) == 0) || | |
1207 | (strnicmp(data, "nodev", 5) == 0) || | |
1208 | (strnicmp(data, "noauto", 6) == 0) || | |
1209 | (strnicmp(data, "dev", 3) == 0)) { | |
1210 | /* The mount tool or mount.cifs helper (if present) | |
50c2f753 SF |
1211 | uses these opts to set flags, and the flags are read |
1212 | by the kernel vfs layer before we get here (ie | |
1213 | before read super) so there is no point trying to | |
1214 | parse these options again and set anything and it | |
1215 | is ok to just ignore them */ | |
1da177e4 | 1216 | continue; |
1da177e4 LT |
1217 | } else if (strnicmp(data, "hard", 4) == 0) { |
1218 | vol->retry = 1; | |
1219 | } else if (strnicmp(data, "soft", 4) == 0) { | |
1220 | vol->retry = 0; | |
1221 | } else if (strnicmp(data, "perm", 4) == 0) { | |
1222 | vol->noperm = 0; | |
1223 | } else if (strnicmp(data, "noperm", 6) == 0) { | |
1224 | vol->noperm = 1; | |
6a0b4824 SF |
1225 | } else if (strnicmp(data, "mapchars", 8) == 0) { |
1226 | vol->remap = 1; | |
1227 | } else if (strnicmp(data, "nomapchars", 10) == 0) { | |
1228 | vol->remap = 0; | |
50c2f753 SF |
1229 | } else if (strnicmp(data, "sfu", 3) == 0) { |
1230 | vol->sfu_emul = 1; | |
1231 | } else if (strnicmp(data, "nosfu", 5) == 0) { | |
1232 | vol->sfu_emul = 0; | |
2c1b8615 SF |
1233 | } else if (strnicmp(data, "nodfs", 5) == 0) { |
1234 | vol->nodfs = 1; | |
ac67055e JA |
1235 | } else if (strnicmp(data, "posixpaths", 10) == 0) { |
1236 | vol->posix_paths = 1; | |
1237 | } else if (strnicmp(data, "noposixpaths", 12) == 0) { | |
1238 | vol->posix_paths = 0; | |
c18c842b SF |
1239 | } else if (strnicmp(data, "nounix", 6) == 0) { |
1240 | vol->no_linux_ext = 1; | |
1241 | } else if (strnicmp(data, "nolinux", 7) == 0) { | |
1242 | vol->no_linux_ext = 1; | |
50c2f753 | 1243 | } else if ((strnicmp(data, "nocase", 6) == 0) || |
a10faeb2 | 1244 | (strnicmp(data, "ignorecase", 10) == 0)) { |
50c2f753 | 1245 | vol->nocase = 1; |
f636a348 JL |
1246 | } else if (strnicmp(data, "mand", 4) == 0) { |
1247 | /* ignore */ | |
1248 | } else if (strnicmp(data, "nomand", 6) == 0) { | |
1249 | /* ignore */ | |
1250 | } else if (strnicmp(data, "_netdev", 7) == 0) { | |
1251 | /* ignore */ | |
c46fa8ac SF |
1252 | } else if (strnicmp(data, "brl", 3) == 0) { |
1253 | vol->nobrl = 0; | |
50c2f753 | 1254 | } else if ((strnicmp(data, "nobrl", 5) == 0) || |
1c955187 | 1255 | (strnicmp(data, "nolock", 6) == 0)) { |
c46fa8ac | 1256 | vol->nobrl = 1; |
d3485d37 SF |
1257 | /* turn off mandatory locking in mode |
1258 | if remote locking is turned off since the | |
1259 | local vfs will do advisory */ | |
50c2f753 SF |
1260 | if (vol->file_mode == |
1261 | (S_IALLUGO & ~(S_ISUID | S_IXGRP))) | |
d3485d37 | 1262 | vol->file_mode = S_IALLUGO; |
13a6e42a SF |
1263 | } else if (strnicmp(data, "forcemandatorylock", 9) == 0) { |
1264 | /* will take the shorter form "forcemand" as well */ | |
1265 | /* This mount option will force use of mandatory | |
1266 | (DOS/Windows style) byte range locks, instead of | |
1267 | using posix advisory byte range locks, even if the | |
1268 | Unix extensions are available and posix locks would | |
1269 | be supported otherwise. If Unix extensions are not | |
1270 | negotiated this has no effect since mandatory locks | |
1271 | would be used (mandatory locks is all that those | |
1272 | those servers support) */ | |
1273 | vol->mand_lock = 1; | |
1da177e4 LT |
1274 | } else if (strnicmp(data, "setuids", 7) == 0) { |
1275 | vol->setuids = 1; | |
1276 | } else if (strnicmp(data, "nosetuids", 9) == 0) { | |
1277 | vol->setuids = 0; | |
d0a9c078 JL |
1278 | } else if (strnicmp(data, "dynperm", 7) == 0) { |
1279 | vol->dynperm = true; | |
1280 | } else if (strnicmp(data, "nodynperm", 9) == 0) { | |
1281 | vol->dynperm = false; | |
1da177e4 LT |
1282 | } else if (strnicmp(data, "nohard", 6) == 0) { |
1283 | vol->retry = 0; | |
1284 | } else if (strnicmp(data, "nosoft", 6) == 0) { | |
1285 | vol->retry = 1; | |
1286 | } else if (strnicmp(data, "nointr", 6) == 0) { | |
1287 | vol->intr = 0; | |
1288 | } else if (strnicmp(data, "intr", 4) == 0) { | |
1289 | vol->intr = 1; | |
be652445 SF |
1290 | } else if (strnicmp(data, "nostrictsync", 12) == 0) { |
1291 | vol->nostrictsync = 1; | |
1292 | } else if (strnicmp(data, "strictsync", 10) == 0) { | |
1293 | vol->nostrictsync = 0; | |
50c2f753 | 1294 | } else if (strnicmp(data, "serverino", 7) == 0) { |
1da177e4 | 1295 | vol->server_ino = 1; |
50c2f753 | 1296 | } else if (strnicmp(data, "noserverino", 9) == 0) { |
1da177e4 | 1297 | vol->server_ino = 0; |
50c2f753 | 1298 | } else if (strnicmp(data, "cifsacl", 7) == 0) { |
0a4b92c0 SF |
1299 | vol->cifs_acl = 1; |
1300 | } else if (strnicmp(data, "nocifsacl", 9) == 0) { | |
1301 | vol->cifs_acl = 0; | |
50c2f753 | 1302 | } else if (strnicmp(data, "acl", 3) == 0) { |
1da177e4 | 1303 | vol->no_psx_acl = 0; |
50c2f753 | 1304 | } else if (strnicmp(data, "noacl", 5) == 0) { |
1da177e4 | 1305 | vol->no_psx_acl = 1; |
84210e91 SF |
1306 | #ifdef CONFIG_CIFS_EXPERIMENTAL |
1307 | } else if (strnicmp(data, "locallease", 6) == 0) { | |
1308 | vol->local_lease = 1; | |
1309 | #endif | |
50c2f753 | 1310 | } else if (strnicmp(data, "sign", 4) == 0) { |
750d1151 | 1311 | vol->secFlg |= CIFSSEC_MUST_SIGN; |
95b1cb90 SF |
1312 | } else if (strnicmp(data, "seal", 4) == 0) { |
1313 | /* we do not do the following in secFlags because seal | |
1314 | is a per tree connection (mount) not a per socket | |
1315 | or per-smb connection option in the protocol */ | |
1316 | /* vol->secFlg |= CIFSSEC_MUST_SEAL; */ | |
1317 | vol->seal = 1; | |
50c2f753 | 1318 | } else if (strnicmp(data, "direct", 6) == 0) { |
1da177e4 | 1319 | vol->direct_io = 1; |
50c2f753 | 1320 | } else if (strnicmp(data, "forcedirectio", 13) == 0) { |
1da177e4 | 1321 | vol->direct_io = 1; |
1da177e4 | 1322 | } else if (strnicmp(data, "noac", 4) == 0) { |
50c2f753 SF |
1323 | printk(KERN_WARNING "CIFS: Mount option noac not " |
1324 | "supported. Instead set " | |
1325 | "/proc/fs/cifs/LookupCacheEnabled to 0\n"); | |
fa1df75d SJ |
1326 | } else if (strnicmp(data, "fsc", 3) == 0) { |
1327 | vol->fsc = true; | |
1da177e4 | 1328 | } else |
50c2f753 SF |
1329 | printk(KERN_WARNING "CIFS: Unknown mount option %s\n", |
1330 | data); | |
1da177e4 LT |
1331 | } |
1332 | if (vol->UNC == NULL) { | |
4523cc30 | 1333 | if (devname == NULL) { |
50c2f753 SF |
1334 | printk(KERN_WARNING "CIFS: Missing UNC name for mount " |
1335 | "target\n"); | |
1da177e4 LT |
1336 | return 1; |
1337 | } | |
1338 | if ((temp_len = strnlen(devname, 300)) < 300) { | |
50c2f753 | 1339 | vol->UNC = kmalloc(temp_len+1, GFP_KERNEL); |
4523cc30 | 1340 | if (vol->UNC == NULL) |
1da177e4 | 1341 | return 1; |
50c2f753 | 1342 | strcpy(vol->UNC, devname); |
1da177e4 LT |
1343 | if (strncmp(vol->UNC, "//", 2) == 0) { |
1344 | vol->UNC[0] = '\\'; | |
1345 | vol->UNC[1] = '\\'; | |
1346 | } else if (strncmp(vol->UNC, "\\\\", 2) != 0) { | |
50c2f753 SF |
1347 | printk(KERN_WARNING "CIFS: UNC Path does not " |
1348 | "begin with // or \\\\ \n"); | |
1da177e4 LT |
1349 | return 1; |
1350 | } | |
7c5e628f IM |
1351 | value = strpbrk(vol->UNC+2, "/\\"); |
1352 | if (value) | |
1353 | *value = '\\'; | |
1da177e4 LT |
1354 | } else { |
1355 | printk(KERN_WARNING "CIFS: UNC name too long\n"); | |
1356 | return 1; | |
1357 | } | |
1358 | } | |
fb8c4b14 | 1359 | if (vol->UNCip == NULL) |
1da177e4 LT |
1360 | vol->UNCip = &vol->UNC[2]; |
1361 | ||
9b9d6b24 JL |
1362 | if (uid_specified) |
1363 | vol->override_uid = override_uid; | |
1364 | else if (override_uid == 1) | |
1365 | printk(KERN_NOTICE "CIFS: ignoring forceuid mount option " | |
1366 | "specified with no uid= option.\n"); | |
1367 | ||
1368 | if (gid_specified) | |
1369 | vol->override_gid = override_gid; | |
1370 | else if (override_gid == 1) | |
1371 | printk(KERN_NOTICE "CIFS: ignoring forcegid mount option " | |
1372 | "specified with no gid= option.\n"); | |
1373 | ||
1da177e4 LT |
1374 | return 0; |
1375 | } | |
1376 | ||
4515148e JL |
1377 | static bool |
1378 | match_address(struct TCP_Server_Info *server, struct sockaddr *addr) | |
1379 | { | |
1380 | struct sockaddr_in *addr4 = (struct sockaddr_in *)addr; | |
1381 | struct sockaddr_in6 *addr6 = (struct sockaddr_in6 *)addr; | |
1382 | ||
1383 | switch (addr->sa_family) { | |
1384 | case AF_INET: | |
1385 | if (addr4->sin_addr.s_addr != | |
1386 | server->addr.sockAddr.sin_addr.s_addr) | |
1387 | return false; | |
1388 | if (addr4->sin_port && | |
1389 | addr4->sin_port != server->addr.sockAddr.sin_port) | |
1390 | return false; | |
1391 | break; | |
1392 | case AF_INET6: | |
1393 | if (!ipv6_addr_equal(&addr6->sin6_addr, | |
1394 | &server->addr.sockAddr6.sin6_addr)) | |
1395 | return false; | |
1396 | if (addr6->sin6_scope_id != | |
1397 | server->addr.sockAddr6.sin6_scope_id) | |
1398 | return false; | |
1399 | if (addr6->sin6_port && | |
1400 | addr6->sin6_port != server->addr.sockAddr6.sin6_port) | |
1401 | return false; | |
1402 | break; | |
1403 | } | |
1404 | ||
1405 | return true; | |
1406 | } | |
1407 | ||
daf5b0b6 JL |
1408 | static bool |
1409 | match_security(struct TCP_Server_Info *server, struct smb_vol *vol) | |
1410 | { | |
1411 | unsigned int secFlags; | |
1412 | ||
1413 | if (vol->secFlg & (~(CIFSSEC_MUST_SIGN | CIFSSEC_MUST_SEAL))) | |
1414 | secFlags = vol->secFlg; | |
1415 | else | |
1416 | secFlags = global_secflags | vol->secFlg; | |
1417 | ||
1418 | switch (server->secType) { | |
1419 | case LANMAN: | |
1420 | if (!(secFlags & (CIFSSEC_MAY_LANMAN|CIFSSEC_MAY_PLNTXT))) | |
1421 | return false; | |
1422 | break; | |
1423 | case NTLMv2: | |
1424 | if (!(secFlags & CIFSSEC_MAY_NTLMV2)) | |
1425 | return false; | |
1426 | break; | |
1427 | case NTLM: | |
1428 | if (!(secFlags & CIFSSEC_MAY_NTLM)) | |
1429 | return false; | |
1430 | break; | |
1431 | case Kerberos: | |
1432 | if (!(secFlags & CIFSSEC_MAY_KRB5)) | |
1433 | return false; | |
1434 | break; | |
1435 | case RawNTLMSSP: | |
1436 | if (!(secFlags & CIFSSEC_MAY_NTLMSSP)) | |
1437 | return false; | |
1438 | break; | |
1439 | default: | |
1440 | /* shouldn't happen */ | |
1441 | return false; | |
1442 | } | |
1443 | ||
1444 | /* now check if signing mode is acceptible */ | |
1445 | if ((secFlags & CIFSSEC_MAY_SIGN) == 0 && | |
1446 | (server->secMode & SECMODE_SIGN_REQUIRED)) | |
1447 | return false; | |
1448 | else if (((secFlags & CIFSSEC_MUST_SIGN) == CIFSSEC_MUST_SIGN) && | |
1449 | (server->secMode & | |
1450 | (SECMODE_SIGN_ENABLED|SECMODE_SIGN_REQUIRED)) == 0) | |
1451 | return false; | |
1452 | ||
1453 | return true; | |
1454 | } | |
1455 | ||
e7ddee90 | 1456 | static struct TCP_Server_Info * |
daf5b0b6 | 1457 | cifs_find_tcp_session(struct sockaddr *addr, struct smb_vol *vol) |
1da177e4 | 1458 | { |
e7ddee90 | 1459 | struct TCP_Server_Info *server; |
e7ddee90 JL |
1460 | |
1461 | write_lock(&cifs_tcp_ses_lock); | |
4515148e | 1462 | list_for_each_entry(server, &cifs_tcp_ses_list, tcp_ses_list) { |
e7ddee90 JL |
1463 | /* |
1464 | * the demux thread can exit on its own while still in CifsNew | |
1465 | * so don't accept any sockets in that state. Since the | |
1466 | * tcpStatus never changes back to CifsNew it's safe to check | |
1467 | * for this without a lock. | |
1468 | */ | |
1469 | if (server->tcpStatus == CifsNew) | |
1b20d672 | 1470 | continue; |
1da177e4 | 1471 | |
4515148e JL |
1472 | if (!match_address(server, addr)) |
1473 | continue; | |
1b20d672 | 1474 | |
daf5b0b6 JL |
1475 | if (!match_security(server, vol)) |
1476 | continue; | |
1477 | ||
e7ddee90 JL |
1478 | ++server->srv_count; |
1479 | write_unlock(&cifs_tcp_ses_lock); | |
b6b38f70 | 1480 | cFYI(1, "Existing tcp session with server found"); |
e7ddee90 | 1481 | return server; |
1da177e4 | 1482 | } |
e7ddee90 | 1483 | write_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1484 | return NULL; |
1485 | } | |
1b20d672 | 1486 | |
14fbf50d | 1487 | static void |
e7ddee90 | 1488 | cifs_put_tcp_session(struct TCP_Server_Info *server) |
1da177e4 | 1489 | { |
e7ddee90 | 1490 | struct task_struct *task; |
1b20d672 | 1491 | |
e7ddee90 JL |
1492 | write_lock(&cifs_tcp_ses_lock); |
1493 | if (--server->srv_count > 0) { | |
1494 | write_unlock(&cifs_tcp_ses_lock); | |
1495 | return; | |
1da177e4 | 1496 | } |
1b20d672 | 1497 | |
e7ddee90 JL |
1498 | list_del_init(&server->tcp_ses_list); |
1499 | write_unlock(&cifs_tcp_ses_lock); | |
dea570e0 | 1500 | |
e7ddee90 JL |
1501 | spin_lock(&GlobalMid_Lock); |
1502 | server->tcpStatus = CifsExiting; | |
1503 | spin_unlock(&GlobalMid_Lock); | |
dea570e0 | 1504 | |
488f1d2d SJ |
1505 | cifs_fscache_release_client_cookie(server); |
1506 | ||
e7ddee90 JL |
1507 | task = xchg(&server->tsk, NULL); |
1508 | if (task) | |
1509 | force_sig(SIGKILL, task); | |
1da177e4 LT |
1510 | } |
1511 | ||
63c038c2 JL |
1512 | static struct TCP_Server_Info * |
1513 | cifs_get_tcp_session(struct smb_vol *volume_info) | |
1514 | { | |
1515 | struct TCP_Server_Info *tcp_ses = NULL; | |
a9ac49d3 | 1516 | struct sockaddr_storage addr; |
63c038c2 JL |
1517 | struct sockaddr_in *sin_server = (struct sockaddr_in *) &addr; |
1518 | struct sockaddr_in6 *sin_server6 = (struct sockaddr_in6 *) &addr; | |
1519 | int rc; | |
1520 | ||
a9ac49d3 | 1521 | memset(&addr, 0, sizeof(struct sockaddr_storage)); |
63c038c2 | 1522 | |
b6b38f70 | 1523 | cFYI(1, "UNC: %s ip: %s", volume_info->UNC, volume_info->UNCip); |
63c038c2 | 1524 | |
1e68b2b2 | 1525 | if (volume_info->UNCip && volume_info->UNC) { |
50d97160 JL |
1526 | rc = cifs_fill_sockaddr((struct sockaddr *)&addr, |
1527 | volume_info->UNCip, | |
67b7626a | 1528 | strlen(volume_info->UNCip), |
50d97160 | 1529 | volume_info->port); |
1e68b2b2 | 1530 | if (!rc) { |
63c038c2 JL |
1531 | /* we failed translating address */ |
1532 | rc = -EINVAL; | |
1533 | goto out_err; | |
1534 | } | |
63c038c2 JL |
1535 | } else if (volume_info->UNCip) { |
1536 | /* BB using ip addr as tcp_ses name to connect to the | |
1537 | DFS root below */ | |
b6b38f70 | 1538 | cERROR(1, "Connecting to DFS root not implemented yet"); |
63c038c2 JL |
1539 | rc = -EINVAL; |
1540 | goto out_err; | |
1541 | } else /* which tcp_sess DFS root would we conect to */ { | |
b6b38f70 JP |
1542 | cERROR(1, "CIFS mount error: No UNC path (e.g. -o " |
1543 | "unc=//192.168.1.100/public) specified"); | |
63c038c2 JL |
1544 | rc = -EINVAL; |
1545 | goto out_err; | |
1546 | } | |
1547 | ||
1548 | /* see if we already have a matching tcp_ses */ | |
daf5b0b6 | 1549 | tcp_ses = cifs_find_tcp_session((struct sockaddr *)&addr, volume_info); |
63c038c2 JL |
1550 | if (tcp_ses) |
1551 | return tcp_ses; | |
1552 | ||
1553 | tcp_ses = kzalloc(sizeof(struct TCP_Server_Info), GFP_KERNEL); | |
1554 | if (!tcp_ses) { | |
1555 | rc = -ENOMEM; | |
1556 | goto out_err; | |
1557 | } | |
1558 | ||
1559 | tcp_ses->hostname = extract_hostname(volume_info->UNC); | |
1560 | if (IS_ERR(tcp_ses->hostname)) { | |
1561 | rc = PTR_ERR(tcp_ses->hostname); | |
1562 | goto out_err; | |
1563 | } | |
1564 | ||
1565 | tcp_ses->noblocksnd = volume_info->noblocksnd; | |
1566 | tcp_ses->noautotune = volume_info->noautotune; | |
6a5fa236 | 1567 | tcp_ses->tcp_nodelay = volume_info->sockopt_tcp_nodelay; |
63c038c2 JL |
1568 | atomic_set(&tcp_ses->inFlight, 0); |
1569 | init_waitqueue_head(&tcp_ses->response_q); | |
1570 | init_waitqueue_head(&tcp_ses->request_q); | |
1571 | INIT_LIST_HEAD(&tcp_ses->pending_mid_q); | |
1572 | mutex_init(&tcp_ses->srv_mutex); | |
1573 | memcpy(tcp_ses->workstation_RFC1001_name, | |
1574 | volume_info->source_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1575 | memcpy(tcp_ses->server_RFC1001_name, | |
1576 | volume_info->target_rfc1001_name, RFC1001_NAME_LEN_WITH_NULL); | |
1577 | tcp_ses->sequence_number = 0; | |
1578 | INIT_LIST_HEAD(&tcp_ses->tcp_ses_list); | |
1579 | INIT_LIST_HEAD(&tcp_ses->smb_ses_list); | |
1580 | ||
1581 | /* | |
1582 | * at this point we are the only ones with the pointer | |
1583 | * to the struct since the kernel thread not created yet | |
1584 | * no need to spinlock this init of tcpStatus or srv_count | |
1585 | */ | |
1586 | tcp_ses->tcpStatus = CifsNew; | |
1587 | ++tcp_ses->srv_count; | |
1588 | ||
a9ac49d3 | 1589 | if (addr.ss_family == AF_INET6) { |
b6b38f70 | 1590 | cFYI(1, "attempting ipv6 connect"); |
63c038c2 JL |
1591 | /* BB should we allow ipv6 on port 139? */ |
1592 | /* other OS never observed in Wild doing 139 with v6 */ | |
1593 | memcpy(&tcp_ses->addr.sockAddr6, sin_server6, | |
1594 | sizeof(struct sockaddr_in6)); | |
d5c5605c | 1595 | rc = ipv6_connect(tcp_ses); |
63c038c2 JL |
1596 | } else { |
1597 | memcpy(&tcp_ses->addr.sockAddr, sin_server, | |
1598 | sizeof(struct sockaddr_in)); | |
bcf4b106 | 1599 | rc = ipv4_connect(tcp_ses); |
63c038c2 JL |
1600 | } |
1601 | if (rc < 0) { | |
b6b38f70 | 1602 | cERROR(1, "Error connecting to socket. Aborting operation"); |
63c038c2 JL |
1603 | goto out_err; |
1604 | } | |
1605 | ||
1606 | /* | |
1607 | * since we're in a cifs function already, we know that | |
1608 | * this will succeed. No need for try_module_get(). | |
1609 | */ | |
1610 | __module_get(THIS_MODULE); | |
1611 | tcp_ses->tsk = kthread_run((void *)(void *)cifs_demultiplex_thread, | |
1612 | tcp_ses, "cifsd"); | |
1613 | if (IS_ERR(tcp_ses->tsk)) { | |
1614 | rc = PTR_ERR(tcp_ses->tsk); | |
b6b38f70 | 1615 | cERROR(1, "error %d create cifsd thread", rc); |
63c038c2 JL |
1616 | module_put(THIS_MODULE); |
1617 | goto out_err; | |
1618 | } | |
1619 | ||
1620 | /* thread spawned, put it on the list */ | |
1621 | write_lock(&cifs_tcp_ses_lock); | |
1622 | list_add(&tcp_ses->tcp_ses_list, &cifs_tcp_ses_list); | |
1623 | write_unlock(&cifs_tcp_ses_lock); | |
1624 | ||
488f1d2d SJ |
1625 | cifs_fscache_get_client_cookie(tcp_ses); |
1626 | ||
63c038c2 JL |
1627 | return tcp_ses; |
1628 | ||
1629 | out_err: | |
1630 | if (tcp_ses) { | |
8347a5cd SF |
1631 | if (!IS_ERR(tcp_ses->hostname)) |
1632 | kfree(tcp_ses->hostname); | |
63c038c2 JL |
1633 | if (tcp_ses->ssocket) |
1634 | sock_release(tcp_ses->ssocket); | |
1635 | kfree(tcp_ses); | |
1636 | } | |
1637 | return ERR_PTR(rc); | |
1638 | } | |
1639 | ||
14fbf50d | 1640 | static struct cifsSesInfo * |
4ff67b72 | 1641 | cifs_find_smb_ses(struct TCP_Server_Info *server, struct smb_vol *vol) |
1da177e4 | 1642 | { |
14fbf50d | 1643 | struct cifsSesInfo *ses; |
dea570e0 | 1644 | |
14fbf50d | 1645 | write_lock(&cifs_tcp_ses_lock); |
4ff67b72 JL |
1646 | list_for_each_entry(ses, &server->smb_ses_list, smb_ses_list) { |
1647 | switch (server->secType) { | |
1648 | case Kerberos: | |
3e4b3e1f | 1649 | if (vol->cred_uid != ses->cred_uid) |
4ff67b72 JL |
1650 | continue; |
1651 | break; | |
1652 | default: | |
1653 | /* anything else takes username/password */ | |
1654 | if (strncmp(ses->userName, vol->username, | |
1655 | MAX_USERNAME_SIZE)) | |
1656 | continue; | |
1657 | if (strlen(vol->username) != 0 && | |
24e6cf92 | 1658 | ses->password != NULL && |
fc87a406 JL |
1659 | strncmp(ses->password, |
1660 | vol->password ? vol->password : "", | |
4ff67b72 JL |
1661 | MAX_PASSWORD_SIZE)) |
1662 | continue; | |
1663 | } | |
14fbf50d JL |
1664 | ++ses->ses_count; |
1665 | write_unlock(&cifs_tcp_ses_lock); | |
1666 | return ses; | |
1667 | } | |
1668 | write_unlock(&cifs_tcp_ses_lock); | |
1669 | return NULL; | |
1670 | } | |
dea570e0 | 1671 | |
14fbf50d JL |
1672 | static void |
1673 | cifs_put_smb_ses(struct cifsSesInfo *ses) | |
1674 | { | |
1675 | int xid; | |
1676 | struct TCP_Server_Info *server = ses->server; | |
dea570e0 | 1677 | |
36988c76 | 1678 | cFYI(1, "%s: ses_count=%d\n", __func__, ses->ses_count); |
14fbf50d JL |
1679 | write_lock(&cifs_tcp_ses_lock); |
1680 | if (--ses->ses_count > 0) { | |
1681 | write_unlock(&cifs_tcp_ses_lock); | |
1682 | return; | |
1683 | } | |
dea570e0 | 1684 | |
14fbf50d JL |
1685 | list_del_init(&ses->smb_ses_list); |
1686 | write_unlock(&cifs_tcp_ses_lock); | |
dea570e0 | 1687 | |
14fbf50d JL |
1688 | if (ses->status == CifsGood) { |
1689 | xid = GetXid(); | |
1690 | CIFSSMBLogoff(xid, ses); | |
1691 | _FreeXid(xid); | |
1692 | } | |
1693 | sesInfoFree(ses); | |
1694 | cifs_put_tcp_session(server); | |
1695 | } | |
dea570e0 | 1696 | |
36988c76 JL |
1697 | static struct cifsSesInfo * |
1698 | cifs_get_smb_ses(struct TCP_Server_Info *server, struct smb_vol *volume_info) | |
1699 | { | |
1700 | int rc = -ENOMEM, xid; | |
1701 | struct cifsSesInfo *ses; | |
1702 | ||
1703 | xid = GetXid(); | |
1704 | ||
4ff67b72 | 1705 | ses = cifs_find_smb_ses(server, volume_info); |
36988c76 JL |
1706 | if (ses) { |
1707 | cFYI(1, "Existing smb sess found (status=%d)", ses->status); | |
1708 | ||
36988c76 | 1709 | mutex_lock(&ses->session_mutex); |
198b5682 JL |
1710 | rc = cifs_negotiate_protocol(xid, ses); |
1711 | if (rc) { | |
1712 | mutex_unlock(&ses->session_mutex); | |
1713 | /* problem -- put our ses reference */ | |
1714 | cifs_put_smb_ses(ses); | |
1715 | FreeXid(xid); | |
1716 | return ERR_PTR(rc); | |
1717 | } | |
36988c76 JL |
1718 | if (ses->need_reconnect) { |
1719 | cFYI(1, "Session needs reconnect"); | |
1720 | rc = cifs_setup_session(xid, ses, | |
1721 | volume_info->local_nls); | |
1722 | if (rc) { | |
1723 | mutex_unlock(&ses->session_mutex); | |
1724 | /* problem -- put our reference */ | |
1725 | cifs_put_smb_ses(ses); | |
1726 | FreeXid(xid); | |
1727 | return ERR_PTR(rc); | |
1728 | } | |
1729 | } | |
1730 | mutex_unlock(&ses->session_mutex); | |
460cf341 JL |
1731 | |
1732 | /* existing SMB ses has a server reference already */ | |
1733 | cifs_put_tcp_session(server); | |
36988c76 JL |
1734 | FreeXid(xid); |
1735 | return ses; | |
1736 | } | |
1737 | ||
1738 | cFYI(1, "Existing smb sess not found"); | |
1739 | ses = sesInfoAlloc(); | |
1740 | if (ses == NULL) | |
1741 | goto get_ses_fail; | |
1742 | ||
1743 | /* new SMB session uses our server ref */ | |
1744 | ses->server = server; | |
1745 | if (server->addr.sockAddr6.sin6_family == AF_INET6) | |
1746 | sprintf(ses->serverName, "%pI6", | |
1747 | &server->addr.sockAddr6.sin6_addr); | |
1748 | else | |
1749 | sprintf(ses->serverName, "%pI4", | |
1750 | &server->addr.sockAddr.sin_addr.s_addr); | |
1751 | ||
1752 | if (volume_info->username) | |
1753 | strncpy(ses->userName, volume_info->username, | |
1754 | MAX_USERNAME_SIZE); | |
1755 | ||
1756 | /* volume_info->password freed at unmount */ | |
1757 | if (volume_info->password) { | |
1758 | ses->password = kstrdup(volume_info->password, GFP_KERNEL); | |
1759 | if (!ses->password) | |
1760 | goto get_ses_fail; | |
1761 | } | |
1762 | if (volume_info->domainname) { | |
1763 | int len = strlen(volume_info->domainname); | |
1764 | ses->domainName = kmalloc(len + 1, GFP_KERNEL); | |
1765 | if (ses->domainName) | |
1766 | strcpy(ses->domainName, volume_info->domainname); | |
1767 | } | |
3e4b3e1f | 1768 | ses->cred_uid = volume_info->cred_uid; |
36988c76 JL |
1769 | ses->linux_uid = volume_info->linux_uid; |
1770 | ses->overrideSecFlg = volume_info->secFlg; | |
1771 | ||
1772 | mutex_lock(&ses->session_mutex); | |
198b5682 JL |
1773 | rc = cifs_negotiate_protocol(xid, ses); |
1774 | if (!rc) | |
1775 | rc = cifs_setup_session(xid, ses, volume_info->local_nls); | |
36988c76 | 1776 | mutex_unlock(&ses->session_mutex); |
c8e56f1f | 1777 | if (rc) |
36988c76 JL |
1778 | goto get_ses_fail; |
1779 | ||
1780 | /* success, put it on the list */ | |
1781 | write_lock(&cifs_tcp_ses_lock); | |
1782 | list_add(&ses->smb_ses_list, &server->smb_ses_list); | |
1783 | write_unlock(&cifs_tcp_ses_lock); | |
1784 | ||
1785 | FreeXid(xid); | |
1786 | return ses; | |
1787 | ||
1788 | get_ses_fail: | |
1789 | sesInfoFree(ses); | |
1790 | FreeXid(xid); | |
1791 | return ERR_PTR(rc); | |
1792 | } | |
1793 | ||
f1987b44 JL |
1794 | static struct cifsTconInfo * |
1795 | cifs_find_tcon(struct cifsSesInfo *ses, const char *unc) | |
1796 | { | |
1797 | struct list_head *tmp; | |
1798 | struct cifsTconInfo *tcon; | |
1799 | ||
1800 | write_lock(&cifs_tcp_ses_lock); | |
1801 | list_for_each(tmp, &ses->tcon_list) { | |
1802 | tcon = list_entry(tmp, struct cifsTconInfo, tcon_list); | |
1803 | if (tcon->tidStatus == CifsExiting) | |
1804 | continue; | |
1805 | if (strncmp(tcon->treeName, unc, MAX_TREE_SIZE)) | |
dea570e0 SF |
1806 | continue; |
1807 | ||
f1987b44 JL |
1808 | ++tcon->tc_count; |
1809 | write_unlock(&cifs_tcp_ses_lock); | |
dea570e0 | 1810 | return tcon; |
1da177e4 | 1811 | } |
f1987b44 | 1812 | write_unlock(&cifs_tcp_ses_lock); |
1da177e4 LT |
1813 | return NULL; |
1814 | } | |
1815 | ||
f1987b44 JL |
1816 | static void |
1817 | cifs_put_tcon(struct cifsTconInfo *tcon) | |
1818 | { | |
1819 | int xid; | |
1820 | struct cifsSesInfo *ses = tcon->ses; | |
1821 | ||
d00c28de | 1822 | cFYI(1, "%s: tc_count=%d\n", __func__, tcon->tc_count); |
f1987b44 JL |
1823 | write_lock(&cifs_tcp_ses_lock); |
1824 | if (--tcon->tc_count > 0) { | |
1825 | write_unlock(&cifs_tcp_ses_lock); | |
1826 | return; | |
1827 | } | |
1828 | ||
1829 | list_del_init(&tcon->tcon_list); | |
1830 | write_unlock(&cifs_tcp_ses_lock); | |
1831 | ||
1832 | xid = GetXid(); | |
1833 | CIFSSMBTDis(xid, tcon); | |
1834 | _FreeXid(xid); | |
1835 | ||
d03382ce | 1836 | cifs_fscache_release_super_cookie(tcon); |
9f841593 | 1837 | tconInfoFree(tcon); |
f1987b44 JL |
1838 | cifs_put_smb_ses(ses); |
1839 | } | |
1840 | ||
d00c28de JL |
1841 | static struct cifsTconInfo * |
1842 | cifs_get_tcon(struct cifsSesInfo *ses, struct smb_vol *volume_info) | |
1843 | { | |
1844 | int rc, xid; | |
1845 | struct cifsTconInfo *tcon; | |
1846 | ||
1847 | tcon = cifs_find_tcon(ses, volume_info->UNC); | |
1848 | if (tcon) { | |
1849 | cFYI(1, "Found match on UNC path"); | |
1850 | /* existing tcon already has a reference */ | |
1851 | cifs_put_smb_ses(ses); | |
1852 | if (tcon->seal != volume_info->seal) | |
1853 | cERROR(1, "transport encryption setting " | |
1854 | "conflicts with existing tid"); | |
1855 | return tcon; | |
1856 | } | |
1857 | ||
1858 | tcon = tconInfoAlloc(); | |
1859 | if (tcon == NULL) { | |
1860 | rc = -ENOMEM; | |
1861 | goto out_fail; | |
1862 | } | |
1863 | ||
1864 | tcon->ses = ses; | |
1865 | if (volume_info->password) { | |
1866 | tcon->password = kstrdup(volume_info->password, GFP_KERNEL); | |
1867 | if (!tcon->password) { | |
1868 | rc = -ENOMEM; | |
1869 | goto out_fail; | |
1870 | } | |
1871 | } | |
1872 | ||
1873 | if (strchr(volume_info->UNC + 3, '\\') == NULL | |
1874 | && strchr(volume_info->UNC + 3, '/') == NULL) { | |
1875 | cERROR(1, "Missing share name"); | |
1876 | rc = -ENODEV; | |
1877 | goto out_fail; | |
1878 | } | |
1879 | ||
1880 | /* BB Do we need to wrap session_mutex around | |
1881 | * this TCon call and Unix SetFS as | |
1882 | * we do on SessSetup and reconnect? */ | |
1883 | xid = GetXid(); | |
1884 | rc = CIFSTCon(xid, ses, volume_info->UNC, tcon, volume_info->local_nls); | |
1885 | FreeXid(xid); | |
1886 | cFYI(1, "CIFS Tcon rc = %d", rc); | |
1887 | if (rc) | |
1888 | goto out_fail; | |
1889 | ||
1890 | if (volume_info->nodfs) { | |
1891 | tcon->Flags &= ~SMB_SHARE_IS_IN_DFS; | |
1892 | cFYI(1, "DFS disabled (%d)", tcon->Flags); | |
1893 | } | |
1894 | tcon->seal = volume_info->seal; | |
1895 | /* we can have only one retry value for a connection | |
1896 | to a share so for resources mounted more than once | |
1897 | to the same server share the last value passed in | |
1898 | for the retry flag is used */ | |
1899 | tcon->retry = volume_info->retry; | |
1900 | tcon->nocase = volume_info->nocase; | |
1901 | tcon->local_lease = volume_info->local_lease; | |
1902 | ||
1903 | write_lock(&cifs_tcp_ses_lock); | |
1904 | list_add(&tcon->tcon_list, &ses->tcon_list); | |
1905 | write_unlock(&cifs_tcp_ses_lock); | |
1906 | ||
d03382ce SJ |
1907 | cifs_fscache_get_super_cookie(tcon); |
1908 | ||
d00c28de JL |
1909 | return tcon; |
1910 | ||
1911 | out_fail: | |
1912 | tconInfoFree(tcon); | |
1913 | return ERR_PTR(rc); | |
1914 | } | |
1915 | ||
1916 | ||
1da177e4 | 1917 | int |
50c2f753 SF |
1918 | get_dfs_path(int xid, struct cifsSesInfo *pSesInfo, const char *old_path, |
1919 | const struct nls_table *nls_codepage, unsigned int *pnum_referrals, | |
366781c1 | 1920 | struct dfs_info3_param **preferrals, int remap) |
1da177e4 LT |
1921 | { |
1922 | char *temp_unc; | |
1923 | int rc = 0; | |
1924 | ||
1925 | *pnum_referrals = 0; | |
366781c1 | 1926 | *preferrals = NULL; |
1da177e4 LT |
1927 | |
1928 | if (pSesInfo->ipc_tid == 0) { | |
1929 | temp_unc = kmalloc(2 /* for slashes */ + | |
50c2f753 SF |
1930 | strnlen(pSesInfo->serverName, |
1931 | SERVER_NAME_LEN_WITH_NULL * 2) | |
1da177e4 LT |
1932 | + 1 + 4 /* slash IPC$ */ + 2, |
1933 | GFP_KERNEL); | |
1934 | if (temp_unc == NULL) | |
1935 | return -ENOMEM; | |
1936 | temp_unc[0] = '\\'; | |
1937 | temp_unc[1] = '\\'; | |
1938 | strcpy(temp_unc + 2, pSesInfo->serverName); | |
1939 | strcpy(temp_unc + 2 + strlen(pSesInfo->serverName), "\\IPC$"); | |
1940 | rc = CIFSTCon(xid, pSesInfo, temp_unc, NULL, nls_codepage); | |
b6b38f70 | 1941 | cFYI(1, "CIFS Tcon rc = %d ipc_tid = %d", rc, pSesInfo->ipc_tid); |
1da177e4 LT |
1942 | kfree(temp_unc); |
1943 | } | |
1944 | if (rc == 0) | |
c2cf07d5 | 1945 | rc = CIFSGetDFSRefer(xid, pSesInfo, old_path, preferrals, |
737b758c | 1946 | pnum_referrals, nls_codepage, remap); |
366781c1 SF |
1947 | /* BB map targetUNCs to dfs_info3 structures, here or |
1948 | in CIFSGetDFSRefer BB */ | |
1da177e4 LT |
1949 | |
1950 | return rc; | |
1951 | } | |
1952 | ||
09e50d55 JL |
1953 | #ifdef CONFIG_DEBUG_LOCK_ALLOC |
1954 | static struct lock_class_key cifs_key[2]; | |
1955 | static struct lock_class_key cifs_slock_key[2]; | |
1956 | ||
1957 | static inline void | |
1958 | cifs_reclassify_socket4(struct socket *sock) | |
1959 | { | |
1960 | struct sock *sk = sock->sk; | |
1961 | BUG_ON(sock_owned_by_user(sk)); | |
1962 | sock_lock_init_class_and_name(sk, "slock-AF_INET-CIFS", | |
1963 | &cifs_slock_key[0], "sk_lock-AF_INET-CIFS", &cifs_key[0]); | |
1964 | } | |
1965 | ||
1966 | static inline void | |
1967 | cifs_reclassify_socket6(struct socket *sock) | |
1968 | { | |
1969 | struct sock *sk = sock->sk; | |
1970 | BUG_ON(sock_owned_by_user(sk)); | |
1971 | sock_lock_init_class_and_name(sk, "slock-AF_INET6-CIFS", | |
1972 | &cifs_slock_key[1], "sk_lock-AF_INET6-CIFS", &cifs_key[1]); | |
1973 | } | |
1974 | #else | |
1975 | static inline void | |
1976 | cifs_reclassify_socket4(struct socket *sock) | |
1977 | { | |
1978 | } | |
1979 | ||
1980 | static inline void | |
1981 | cifs_reclassify_socket6(struct socket *sock) | |
1982 | { | |
1983 | } | |
1984 | #endif | |
1985 | ||
1da177e4 | 1986 | /* See RFC1001 section 14 on representation of Netbios names */ |
50c2f753 | 1987 | static void rfc1002mangle(char *target, char *source, unsigned int length) |
1da177e4 | 1988 | { |
50c2f753 | 1989 | unsigned int i, j; |
1da177e4 | 1990 | |
50c2f753 | 1991 | for (i = 0, j = 0; i < (length); i++) { |
1da177e4 LT |
1992 | /* mask a nibble at a time and encode */ |
1993 | target[j] = 'A' + (0x0F & (source[i] >> 4)); | |
1994 | target[j+1] = 'A' + (0x0F & source[i]); | |
50c2f753 | 1995 | j += 2; |
1da177e4 LT |
1996 | } |
1997 | ||
1998 | } | |
1999 | ||
2000 | ||
2001 | static int | |
bcf4b106 | 2002 | ipv4_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2003 | { |
2004 | int rc = 0; | |
6a5fa236 | 2005 | int val; |
bcf4b106 | 2006 | bool connected = false; |
1da177e4 | 2007 | __be16 orig_port = 0; |
bcf4b106 | 2008 | struct socket *socket = server->ssocket; |
1da177e4 | 2009 | |
bcf4b106 | 2010 | if (socket == NULL) { |
50c2f753 | 2011 | rc = sock_create_kern(PF_INET, SOCK_STREAM, |
bcf4b106 | 2012 | IPPROTO_TCP, &socket); |
1da177e4 | 2013 | if (rc < 0) { |
b6b38f70 | 2014 | cERROR(1, "Error %d creating socket", rc); |
1da177e4 | 2015 | return rc; |
1da177e4 | 2016 | } |
bcf4b106 JL |
2017 | |
2018 | /* BB other socket options to set KEEPALIVE, NODELAY? */ | |
b6b38f70 | 2019 | cFYI(1, "Socket created"); |
bcf4b106 JL |
2020 | server->ssocket = socket; |
2021 | socket->sk->sk_allocation = GFP_NOFS; | |
2022 | cifs_reclassify_socket4(socket); | |
1da177e4 LT |
2023 | } |
2024 | ||
bcf4b106 JL |
2025 | /* user overrode default port */ |
2026 | if (server->addr.sockAddr.sin_port) { | |
2027 | rc = socket->ops->connect(socket, (struct sockaddr *) | |
2028 | &server->addr.sockAddr, | |
2029 | sizeof(struct sockaddr_in), 0); | |
1da177e4 | 2030 | if (rc >= 0) |
bcf4b106 | 2031 | connected = true; |
50c2f753 | 2032 | } |
1da177e4 | 2033 | |
fb8c4b14 | 2034 | if (!connected) { |
50c2f753 | 2035 | /* save original port so we can retry user specified port |
1da177e4 | 2036 | later if fall back ports fail this time */ |
bcf4b106 | 2037 | orig_port = server->addr.sockAddr.sin_port; |
1da177e4 LT |
2038 | |
2039 | /* do not retry on the same port we just failed on */ | |
bcf4b106 JL |
2040 | if (server->addr.sockAddr.sin_port != htons(CIFS_PORT)) { |
2041 | server->addr.sockAddr.sin_port = htons(CIFS_PORT); | |
2042 | rc = socket->ops->connect(socket, | |
2043 | (struct sockaddr *) | |
2044 | &server->addr.sockAddr, | |
2045 | sizeof(struct sockaddr_in), 0); | |
1da177e4 | 2046 | if (rc >= 0) |
bcf4b106 | 2047 | connected = true; |
1da177e4 LT |
2048 | } |
2049 | } | |
2050 | if (!connected) { | |
bcf4b106 JL |
2051 | server->addr.sockAddr.sin_port = htons(RFC1001_PORT); |
2052 | rc = socket->ops->connect(socket, (struct sockaddr *) | |
2053 | &server->addr.sockAddr, | |
6345a3a8 | 2054 | sizeof(struct sockaddr_in), 0); |
50c2f753 | 2055 | if (rc >= 0) |
bcf4b106 | 2056 | connected = true; |
1da177e4 LT |
2057 | } |
2058 | ||
2059 | /* give up here - unless we want to retry on different | |
2060 | protocol families some day */ | |
2061 | if (!connected) { | |
fb8c4b14 | 2062 | if (orig_port) |
bcf4b106 | 2063 | server->addr.sockAddr.sin_port = orig_port; |
b6b38f70 | 2064 | cFYI(1, "Error %d connecting to server via ipv4", rc); |
bcf4b106 JL |
2065 | sock_release(socket); |
2066 | server->ssocket = NULL; | |
1da177e4 LT |
2067 | return rc; |
2068 | } | |
bcf4b106 JL |
2069 | |
2070 | ||
2071 | /* | |
2072 | * Eventually check for other socket options to change from | |
2073 | * the default. sock_setsockopt not used because it expects | |
2074 | * user space buffer | |
2075 | */ | |
2076 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2077 | socket->sk->sk_sndtimeo = 5 * HZ; |
edf1ae40 | 2078 | |
b387eaeb | 2079 | /* make the bufsizes depend on wsize/rsize and max requests */ |
bcf4b106 JL |
2080 | if (server->noautotune) { |
2081 | if (socket->sk->sk_sndbuf < (200 * 1024)) | |
2082 | socket->sk->sk_sndbuf = 200 * 1024; | |
2083 | if (socket->sk->sk_rcvbuf < (140 * 1024)) | |
2084 | socket->sk->sk_rcvbuf = 140 * 1024; | |
edf1ae40 | 2085 | } |
1da177e4 | 2086 | |
6a5fa236 SF |
2087 | if (server->tcp_nodelay) { |
2088 | val = 1; | |
2089 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, | |
2090 | (char *)&val, sizeof(val)); | |
2091 | if (rc) | |
b6b38f70 | 2092 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2093 | } |
2094 | ||
b6b38f70 | 2095 | cFYI(1, "sndbuf %d rcvbuf %d rcvtimeo 0x%lx", |
bcf4b106 | 2096 | socket->sk->sk_sndbuf, |
b6b38f70 | 2097 | socket->sk->sk_rcvbuf, socket->sk->sk_rcvtimeo); |
bcf4b106 | 2098 | |
1da177e4 | 2099 | /* send RFC1001 sessinit */ |
bcf4b106 | 2100 | if (server->addr.sockAddr.sin_port == htons(RFC1001_PORT)) { |
1da177e4 | 2101 | /* some servers require RFC1001 sessinit before sending |
50c2f753 | 2102 | negprot - BB check reconnection in case where second |
1da177e4 | 2103 | sessinit is sent but no second negprot */ |
50c2f753 SF |
2104 | struct rfc1002_session_packet *ses_init_buf; |
2105 | struct smb_hdr *smb_buf; | |
2106 | ses_init_buf = kzalloc(sizeof(struct rfc1002_session_packet), | |
2107 | GFP_KERNEL); | |
fb8c4b14 | 2108 | if (ses_init_buf) { |
1da177e4 | 2109 | ses_init_buf->trailer.session_req.called_len = 32; |
bcf4b106 JL |
2110 | if (server->server_RFC1001_name && |
2111 | server->server_RFC1001_name[0] != 0) | |
8ecaf67a JL |
2112 | rfc1002mangle(ses_init_buf->trailer. |
2113 | session_req.called_name, | |
bcf4b106 | 2114 | server->server_RFC1001_name, |
8ecaf67a | 2115 | RFC1001_NAME_LEN_WITH_NULL); |
bcf4b106 | 2116 | else |
8ecaf67a JL |
2117 | rfc1002mangle(ses_init_buf->trailer. |
2118 | session_req.called_name, | |
2119 | DEFAULT_CIFS_CALLED_NAME, | |
2120 | RFC1001_NAME_LEN_WITH_NULL); | |
a10faeb2 | 2121 | |
1da177e4 | 2122 | ses_init_buf->trailer.session_req.calling_len = 32; |
bcf4b106 | 2123 | |
1da177e4 LT |
2124 | /* calling name ends in null (byte 16) from old smb |
2125 | convention. */ | |
bcf4b106 JL |
2126 | if (server->workstation_RFC1001_name && |
2127 | server->workstation_RFC1001_name[0] != 0) | |
8ecaf67a JL |
2128 | rfc1002mangle(ses_init_buf->trailer. |
2129 | session_req.calling_name, | |
bcf4b106 | 2130 | server->workstation_RFC1001_name, |
8ecaf67a | 2131 | RFC1001_NAME_LEN_WITH_NULL); |
bcf4b106 | 2132 | else |
8ecaf67a JL |
2133 | rfc1002mangle(ses_init_buf->trailer. |
2134 | session_req.calling_name, | |
2135 | "LINUX_CIFS_CLNT", | |
2136 | RFC1001_NAME_LEN_WITH_NULL); | |
bcf4b106 | 2137 | |
1da177e4 LT |
2138 | ses_init_buf->trailer.session_req.scope1 = 0; |
2139 | ses_init_buf->trailer.session_req.scope2 = 0; | |
2140 | smb_buf = (struct smb_hdr *)ses_init_buf; | |
2141 | /* sizeof RFC1002_SESSION_REQUEST with no scope */ | |
2142 | smb_buf->smb_buf_length = 0x81000044; | |
0496e02d | 2143 | rc = smb_send(server, smb_buf, 0x44); |
1da177e4 | 2144 | kfree(ses_init_buf); |
50c2f753 | 2145 | msleep(1); /* RFC1001 layer in at least one server |
083d3a2c SF |
2146 | requires very short break before negprot |
2147 | presumably because not expecting negprot | |
2148 | to follow so fast. This is a simple | |
50c2f753 | 2149 | solution that works without |
083d3a2c SF |
2150 | complicating the code and causes no |
2151 | significant slowing down on mount | |
2152 | for everyone else */ | |
1da177e4 | 2153 | } |
50c2f753 | 2154 | /* else the negprot may still work without this |
1da177e4 | 2155 | even though malloc failed */ |
50c2f753 | 2156 | |
1da177e4 | 2157 | } |
50c2f753 | 2158 | |
1da177e4 LT |
2159 | return rc; |
2160 | } | |
2161 | ||
2162 | static int | |
d5c5605c | 2163 | ipv6_connect(struct TCP_Server_Info *server) |
1da177e4 LT |
2164 | { |
2165 | int rc = 0; | |
6a5fa236 | 2166 | int val; |
d5c5605c | 2167 | bool connected = false; |
1da177e4 | 2168 | __be16 orig_port = 0; |
d5c5605c | 2169 | struct socket *socket = server->ssocket; |
1da177e4 | 2170 | |
d5c5605c | 2171 | if (socket == NULL) { |
50c2f753 | 2172 | rc = sock_create_kern(PF_INET6, SOCK_STREAM, |
d5c5605c | 2173 | IPPROTO_TCP, &socket); |
1da177e4 | 2174 | if (rc < 0) { |
b6b38f70 | 2175 | cERROR(1, "Error %d creating ipv6 socket", rc); |
d5c5605c | 2176 | socket = NULL; |
1da177e4 | 2177 | return rc; |
1da177e4 | 2178 | } |
1da177e4 | 2179 | |
d5c5605c | 2180 | /* BB other socket options to set KEEPALIVE, NODELAY? */ |
b6b38f70 | 2181 | cFYI(1, "ipv6 Socket created"); |
d5c5605c JL |
2182 | server->ssocket = socket; |
2183 | socket->sk->sk_allocation = GFP_NOFS; | |
2184 | cifs_reclassify_socket6(socket); | |
2185 | } | |
1da177e4 | 2186 | |
d5c5605c JL |
2187 | /* user overrode default port */ |
2188 | if (server->addr.sockAddr6.sin6_port) { | |
2189 | rc = socket->ops->connect(socket, | |
2190 | (struct sockaddr *) &server->addr.sockAddr6, | |
6345a3a8 | 2191 | sizeof(struct sockaddr_in6), 0); |
1da177e4 | 2192 | if (rc >= 0) |
d5c5605c | 2193 | connected = true; |
50c2f753 | 2194 | } |
1da177e4 | 2195 | |
fb8c4b14 | 2196 | if (!connected) { |
50c2f753 | 2197 | /* save original port so we can retry user specified port |
1da177e4 LT |
2198 | later if fall back ports fail this time */ |
2199 | ||
d5c5605c | 2200 | orig_port = server->addr.sockAddr6.sin6_port; |
1da177e4 | 2201 | /* do not retry on the same port we just failed on */ |
d5c5605c JL |
2202 | if (server->addr.sockAddr6.sin6_port != htons(CIFS_PORT)) { |
2203 | server->addr.sockAddr6.sin6_port = htons(CIFS_PORT); | |
2204 | rc = socket->ops->connect(socket, (struct sockaddr *) | |
2205 | &server->addr.sockAddr6, | |
6345a3a8 | 2206 | sizeof(struct sockaddr_in6), 0); |
1da177e4 | 2207 | if (rc >= 0) |
d5c5605c | 2208 | connected = true; |
1da177e4 LT |
2209 | } |
2210 | } | |
2211 | if (!connected) { | |
d5c5605c JL |
2212 | server->addr.sockAddr6.sin6_port = htons(RFC1001_PORT); |
2213 | rc = socket->ops->connect(socket, (struct sockaddr *) | |
2214 | &server->addr.sockAddr6, | |
2215 | sizeof(struct sockaddr_in6), 0); | |
50c2f753 | 2216 | if (rc >= 0) |
d5c5605c | 2217 | connected = true; |
1da177e4 LT |
2218 | } |
2219 | ||
2220 | /* give up here - unless we want to retry on different | |
2221 | protocol families some day */ | |
2222 | if (!connected) { | |
fb8c4b14 | 2223 | if (orig_port) |
d5c5605c | 2224 | server->addr.sockAddr6.sin6_port = orig_port; |
b6b38f70 | 2225 | cFYI(1, "Error %d connecting to server via ipv6", rc); |
d5c5605c JL |
2226 | sock_release(socket); |
2227 | server->ssocket = NULL; | |
1da177e4 LT |
2228 | return rc; |
2229 | } | |
edf1ae40 | 2230 | |
d5c5605c JL |
2231 | /* |
2232 | * Eventually check for other socket options to change from | |
2233 | * the default. sock_setsockopt not used because it expects | |
2234 | * user space buffer | |
2235 | */ | |
2236 | socket->sk->sk_rcvtimeo = 7 * HZ; | |
da505c38 | 2237 | socket->sk->sk_sndtimeo = 5 * HZ; |
6a5fa236 SF |
2238 | |
2239 | if (server->tcp_nodelay) { | |
2240 | val = 1; | |
2241 | rc = kernel_setsockopt(socket, SOL_TCP, TCP_NODELAY, | |
2242 | (char *)&val, sizeof(val)); | |
2243 | if (rc) | |
b6b38f70 | 2244 | cFYI(1, "set TCP_NODELAY socket option error %d", rc); |
6a5fa236 SF |
2245 | } |
2246 | ||
d5c5605c | 2247 | server->ssocket = socket; |
50c2f753 | 2248 | |
1da177e4 LT |
2249 | return rc; |
2250 | } | |
2251 | ||
50c2f753 SF |
2252 | void reset_cifs_unix_caps(int xid, struct cifsTconInfo *tcon, |
2253 | struct super_block *sb, struct smb_vol *vol_info) | |
8af18971 SF |
2254 | { |
2255 | /* if we are reconnecting then should we check to see if | |
2256 | * any requested capabilities changed locally e.g. via | |
2257 | * remount but we can not do much about it here | |
2258 | * if they have (even if we could detect it by the following) | |
2259 | * Perhaps we could add a backpointer to array of sb from tcon | |
2260 | * or if we change to make all sb to same share the same | |
2261 | * sb as NFS - then we only have one backpointer to sb. | |
2262 | * What if we wanted to mount the server share twice once with | |
2263 | * and once without posixacls or posix paths? */ | |
2264 | __u64 saved_cap = le64_to_cpu(tcon->fsUnixInfo.Capability); | |
50c2f753 | 2265 | |
c18c842b SF |
2266 | if (vol_info && vol_info->no_linux_ext) { |
2267 | tcon->fsUnixInfo.Capability = 0; | |
2268 | tcon->unix_ext = 0; /* Unix Extensions disabled */ | |
b6b38f70 | 2269 | cFYI(1, "Linux protocol extensions disabled"); |
c18c842b SF |
2270 | return; |
2271 | } else if (vol_info) | |
2272 | tcon->unix_ext = 1; /* Unix Extensions supported */ | |
2273 | ||
2274 | if (tcon->unix_ext == 0) { | |
b6b38f70 | 2275 | cFYI(1, "Unix extensions disabled so not set on reconnect"); |
c18c842b SF |
2276 | return; |
2277 | } | |
50c2f753 | 2278 | |
fb8c4b14 | 2279 | if (!CIFSSMBQFSUnixInfo(xid, tcon)) { |
8af18971 | 2280 | __u64 cap = le64_to_cpu(tcon->fsUnixInfo.Capability); |
50c2f753 | 2281 | |
8af18971 SF |
2282 | /* check for reconnect case in which we do not |
2283 | want to change the mount behavior if we can avoid it */ | |
fb8c4b14 | 2284 | if (vol_info == NULL) { |
50c2f753 | 2285 | /* turn off POSIX ACL and PATHNAMES if not set |
8af18971 SF |
2286 | originally at mount time */ |
2287 | if ((saved_cap & CIFS_UNIX_POSIX_ACL_CAP) == 0) | |
2288 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; | |
11b6d645 IM |
2289 | if ((saved_cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
2290 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) | |
b6b38f70 | 2291 | cERROR(1, "POSIXPATH support change"); |
8af18971 | 2292 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
11b6d645 | 2293 | } else if ((cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) == 0) { |
b6b38f70 JP |
2294 | cERROR(1, "possible reconnect error"); |
2295 | cERROR(1, "server disabled POSIX path support"); | |
11b6d645 | 2296 | } |
8af18971 | 2297 | } |
50c2f753 | 2298 | |
8af18971 | 2299 | cap &= CIFS_UNIX_CAP_MASK; |
75865f8c | 2300 | if (vol_info && vol_info->no_psx_acl) |
8af18971 | 2301 | cap &= ~CIFS_UNIX_POSIX_ACL_CAP; |
75865f8c | 2302 | else if (CIFS_UNIX_POSIX_ACL_CAP & cap) { |
b6b38f70 | 2303 | cFYI(1, "negotiated posix acl support"); |
fb8c4b14 | 2304 | if (sb) |
8af18971 SF |
2305 | sb->s_flags |= MS_POSIXACL; |
2306 | } | |
2307 | ||
75865f8c | 2308 | if (vol_info && vol_info->posix_paths == 0) |
8af18971 | 2309 | cap &= ~CIFS_UNIX_POSIX_PATHNAMES_CAP; |
75865f8c | 2310 | else if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) { |
b6b38f70 | 2311 | cFYI(1, "negotiate posix pathnames"); |
75865f8c | 2312 | if (sb) |
50c2f753 | 2313 | CIFS_SB(sb)->mnt_cifs_flags |= |
8af18971 SF |
2314 | CIFS_MOUNT_POSIX_PATHS; |
2315 | } | |
50c2f753 | 2316 | |
984acfe1 SF |
2317 | /* We might be setting the path sep back to a different |
2318 | form if we are reconnecting and the server switched its | |
50c2f753 | 2319 | posix path capability for this share */ |
75865f8c | 2320 | if (sb && (CIFS_SB(sb)->prepathlen > 0)) |
984acfe1 | 2321 | CIFS_SB(sb)->prepath[0] = CIFS_DIR_SEP(CIFS_SB(sb)); |
75865f8c SF |
2322 | |
2323 | if (sb && (CIFS_SB(sb)->rsize > 127 * 1024)) { | |
2324 | if ((cap & CIFS_UNIX_LARGE_READ_CAP) == 0) { | |
2325 | CIFS_SB(sb)->rsize = 127 * 1024; | |
b6b38f70 | 2326 | cFYI(DBG2, "larger reads not supported by srv"); |
75865f8c SF |
2327 | } |
2328 | } | |
50c2f753 SF |
2329 | |
2330 | ||
b6b38f70 | 2331 | cFYI(1, "Negotiate caps 0x%x", (int)cap); |
8af18971 | 2332 | #ifdef CONFIG_CIFS_DEBUG2 |
75865f8c | 2333 | if (cap & CIFS_UNIX_FCNTL_CAP) |
b6b38f70 | 2334 | cFYI(1, "FCNTL cap"); |
75865f8c | 2335 | if (cap & CIFS_UNIX_EXTATTR_CAP) |
b6b38f70 | 2336 | cFYI(1, "EXTATTR cap"); |
75865f8c | 2337 | if (cap & CIFS_UNIX_POSIX_PATHNAMES_CAP) |
b6b38f70 | 2338 | cFYI(1, "POSIX path cap"); |
75865f8c | 2339 | if (cap & CIFS_UNIX_XATTR_CAP) |
b6b38f70 | 2340 | cFYI(1, "XATTR cap"); |
75865f8c | 2341 | if (cap & CIFS_UNIX_POSIX_ACL_CAP) |
b6b38f70 | 2342 | cFYI(1, "POSIX ACL cap"); |
75865f8c | 2343 | if (cap & CIFS_UNIX_LARGE_READ_CAP) |
b6b38f70 | 2344 | cFYI(1, "very large read cap"); |
75865f8c | 2345 | if (cap & CIFS_UNIX_LARGE_WRITE_CAP) |
b6b38f70 | 2346 | cFYI(1, "very large write cap"); |
8af18971 SF |
2347 | #endif /* CIFS_DEBUG2 */ |
2348 | if (CIFSSMBSetFSUnixInfo(xid, tcon, cap)) { | |
442aa310 | 2349 | if (vol_info == NULL) { |
b6b38f70 | 2350 | cFYI(1, "resetting capabilities failed"); |
442aa310 | 2351 | } else |
b6b38f70 | 2352 | cERROR(1, "Negotiating Unix capabilities " |
5a44b319 SF |
2353 | "with the server failed. Consider " |
2354 | "mounting with the Unix Extensions\n" | |
2355 | "disabled, if problems are found, " | |
2356 | "by specifying the nounix mount " | |
b6b38f70 | 2357 | "option."); |
5a44b319 | 2358 | |
8af18971 SF |
2359 | } |
2360 | } | |
2361 | } | |
2362 | ||
03a143c9 SF |
2363 | static void |
2364 | convert_delimiter(char *path, char delim) | |
2365 | { | |
2366 | int i; | |
c2d68ea6 | 2367 | char old_delim; |
03a143c9 SF |
2368 | |
2369 | if (path == NULL) | |
2370 | return; | |
2371 | ||
582d21e5 | 2372 | if (delim == '/') |
c2d68ea6 SF |
2373 | old_delim = '\\'; |
2374 | else | |
2375 | old_delim = '/'; | |
2376 | ||
03a143c9 | 2377 | for (i = 0; path[i] != '\0'; i++) { |
c2d68ea6 | 2378 | if (path[i] == old_delim) |
03a143c9 SF |
2379 | path[i] = delim; |
2380 | } | |
2381 | } | |
2382 | ||
3b795210 SF |
2383 | static void setup_cifs_sb(struct smb_vol *pvolume_info, |
2384 | struct cifs_sb_info *cifs_sb) | |
b1c8d2b4 | 2385 | { |
3b795210 | 2386 | if (pvolume_info->rsize > CIFSMaxBufSize) { |
b6b38f70 JP |
2387 | cERROR(1, "rsize %d too large, using MaxBufSize", |
2388 | pvolume_info->rsize); | |
3b795210 SF |
2389 | cifs_sb->rsize = CIFSMaxBufSize; |
2390 | } else if ((pvolume_info->rsize) && | |
2391 | (pvolume_info->rsize <= CIFSMaxBufSize)) | |
2392 | cifs_sb->rsize = pvolume_info->rsize; | |
2393 | else /* default */ | |
2394 | cifs_sb->rsize = CIFSMaxBufSize; | |
2395 | ||
2396 | if (pvolume_info->wsize > PAGEVEC_SIZE * PAGE_CACHE_SIZE) { | |
b6b38f70 JP |
2397 | cERROR(1, "wsize %d too large, using 4096 instead", |
2398 | pvolume_info->wsize); | |
3b795210 SF |
2399 | cifs_sb->wsize = 4096; |
2400 | } else if (pvolume_info->wsize) | |
2401 | cifs_sb->wsize = pvolume_info->wsize; | |
2402 | else | |
2403 | cifs_sb->wsize = min_t(const int, | |
2404 | PAGEVEC_SIZE * PAGE_CACHE_SIZE, | |
2405 | 127*1024); | |
2406 | /* old default of CIFSMaxBufSize was too small now | |
2407 | that SMB Write2 can send multiple pages in kvec. | |
2408 | RFC1001 does not describe what happens when frame | |
2409 | bigger than 128K is sent so use that as max in | |
2410 | conjunction with 52K kvec constraint on arch with 4K | |
2411 | page size */ | |
2412 | ||
2413 | if (cifs_sb->rsize < 2048) { | |
2414 | cifs_sb->rsize = 2048; | |
2415 | /* Windows ME may prefer this */ | |
b6b38f70 | 2416 | cFYI(1, "readsize set to minimum: 2048"); |
3b795210 SF |
2417 | } |
2418 | /* calculate prepath */ | |
2419 | cifs_sb->prepath = pvolume_info->prepath; | |
2420 | if (cifs_sb->prepath) { | |
2421 | cifs_sb->prepathlen = strlen(cifs_sb->prepath); | |
2422 | /* we can not convert the / to \ in the path | |
2423 | separators in the prefixpath yet because we do not | |
2424 | know (until reset_cifs_unix_caps is called later) | |
2425 | whether POSIX PATH CAP is available. We normalize | |
2426 | the / to \ after reset_cifs_unix_caps is called */ | |
2427 | pvolume_info->prepath = NULL; | |
2428 | } else | |
2429 | cifs_sb->prepathlen = 0; | |
2430 | cifs_sb->mnt_uid = pvolume_info->linux_uid; | |
2431 | cifs_sb->mnt_gid = pvolume_info->linux_gid; | |
2432 | cifs_sb->mnt_file_mode = pvolume_info->file_mode; | |
2433 | cifs_sb->mnt_dir_mode = pvolume_info->dir_mode; | |
b6b38f70 JP |
2434 | cFYI(1, "file mode: 0x%x dir mode: 0x%x", |
2435 | cifs_sb->mnt_file_mode, cifs_sb->mnt_dir_mode); | |
3b795210 SF |
2436 | |
2437 | if (pvolume_info->noperm) | |
2438 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_PERM; | |
2439 | if (pvolume_info->setuids) | |
2440 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SET_UID; | |
2441 | if (pvolume_info->server_ino) | |
2442 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_SERVER_INUM; | |
2443 | if (pvolume_info->remap) | |
2444 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_MAP_SPECIAL_CHR; | |
2445 | if (pvolume_info->no_xattr) | |
2446 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_XATTR; | |
2447 | if (pvolume_info->sfu_emul) | |
2448 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_UNX_EMUL; | |
2449 | if (pvolume_info->nobrl) | |
2450 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NO_BRL; | |
be652445 | 2451 | if (pvolume_info->nostrictsync) |
4717bed6 | 2452 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOSSYNC; |
13a6e42a SF |
2453 | if (pvolume_info->mand_lock) |
2454 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_NOPOSIXBRL; | |
3b795210 SF |
2455 | if (pvolume_info->cifs_acl) |
2456 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_CIFS_ACL; | |
2457 | if (pvolume_info->override_uid) | |
2458 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_UID; | |
2459 | if (pvolume_info->override_gid) | |
2460 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_OVERR_GID; | |
2461 | if (pvolume_info->dynperm) | |
2462 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DYNPERM; | |
fa1df75d SJ |
2463 | if (pvolume_info->fsc) |
2464 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_FSCACHE; | |
3b795210 | 2465 | if (pvolume_info->direct_io) { |
b6b38f70 | 2466 | cFYI(1, "mounting share using direct i/o"); |
3b795210 SF |
2467 | cifs_sb->mnt_cifs_flags |= CIFS_MOUNT_DIRECT_IO; |
2468 | } | |
2469 | ||
2470 | if ((pvolume_info->cifs_acl) && (pvolume_info->dynperm)) | |
b6b38f70 JP |
2471 | cERROR(1, "mount option dynperm ignored if cifsacl " |
2472 | "mount option supported"); | |
b1c8d2b4 JL |
2473 | } |
2474 | ||
e4cce94c IM |
2475 | static int |
2476 | is_path_accessible(int xid, struct cifsTconInfo *tcon, | |
2477 | struct cifs_sb_info *cifs_sb, const char *full_path) | |
2478 | { | |
2479 | int rc; | |
e4cce94c IM |
2480 | FILE_ALL_INFO *pfile_info; |
2481 | ||
e4cce94c IM |
2482 | pfile_info = kmalloc(sizeof(FILE_ALL_INFO), GFP_KERNEL); |
2483 | if (pfile_info == NULL) | |
2484 | return -ENOMEM; | |
2485 | ||
2486 | rc = CIFSSMBQPathInfo(xid, tcon, full_path, pfile_info, | |
2487 | 0 /* not legacy */, cifs_sb->local_nls, | |
2488 | cifs_sb->mnt_cifs_flags & | |
2489 | CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2490 | kfree(pfile_info); | |
2491 | return rc; | |
2492 | } | |
2493 | ||
1bfe73c2 IM |
2494 | static void |
2495 | cleanup_volume_info(struct smb_vol **pvolume_info) | |
2496 | { | |
2497 | struct smb_vol *volume_info; | |
2498 | ||
ad6cca6d | 2499 | if (!pvolume_info || !*pvolume_info) |
1bfe73c2 IM |
2500 | return; |
2501 | ||
2502 | volume_info = *pvolume_info; | |
2503 | kzfree(volume_info->password); | |
2504 | kfree(volume_info->UNC); | |
2505 | kfree(volume_info->prepath); | |
2506 | kfree(volume_info); | |
2507 | *pvolume_info = NULL; | |
2508 | return; | |
2509 | } | |
2510 | ||
2d6d589d | 2511 | #ifdef CONFIG_CIFS_DFS_UPCALL |
1bfe73c2 IM |
2512 | /* build_path_to_root returns full path to root when |
2513 | * we do not have an exiting connection (tcon) */ | |
2514 | static char * | |
2515 | build_unc_path_to_root(const struct smb_vol *volume_info, | |
2516 | const struct cifs_sb_info *cifs_sb) | |
2517 | { | |
2518 | char *full_path; | |
2519 | ||
2520 | int unc_len = strnlen(volume_info->UNC, MAX_TREE_SIZE + 1); | |
2521 | full_path = kmalloc(unc_len + cifs_sb->prepathlen + 1, GFP_KERNEL); | |
2522 | if (full_path == NULL) | |
2523 | return ERR_PTR(-ENOMEM); | |
2524 | ||
2525 | strncpy(full_path, volume_info->UNC, unc_len); | |
2526 | if (cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) { | |
2527 | int i; | |
2528 | for (i = 0; i < unc_len; i++) { | |
2529 | if (full_path[i] == '\\') | |
2530 | full_path[i] = '/'; | |
2531 | } | |
2532 | } | |
2533 | ||
2534 | if (cifs_sb->prepathlen) | |
2535 | strncpy(full_path + unc_len, cifs_sb->prepath, | |
2536 | cifs_sb->prepathlen); | |
2537 | ||
2538 | full_path[unc_len + cifs_sb->prepathlen] = 0; /* add trailing null */ | |
2539 | return full_path; | |
2540 | } | |
2d6d589d | 2541 | #endif |
1bfe73c2 | 2542 | |
1da177e4 LT |
2543 | int |
2544 | cifs_mount(struct super_block *sb, struct cifs_sb_info *cifs_sb, | |
1bfe73c2 | 2545 | char *mount_data_global, const char *devname) |
1da177e4 | 2546 | { |
a2934c7b | 2547 | int rc; |
1da177e4 | 2548 | int xid; |
7586b765 | 2549 | struct smb_vol *volume_info; |
a2934c7b JL |
2550 | struct cifsSesInfo *pSesInfo; |
2551 | struct cifsTconInfo *tcon; | |
2552 | struct TCP_Server_Info *srvTcp; | |
e4cce94c | 2553 | char *full_path; |
2d6d589d SF |
2554 | char *mount_data = mount_data_global; |
2555 | #ifdef CONFIG_CIFS_DFS_UPCALL | |
1bfe73c2 IM |
2556 | struct dfs_info3_param *referrals = NULL; |
2557 | unsigned int num_referrals = 0; | |
5c2503a8 | 2558 | int referral_walks_count = 0; |
1bfe73c2 | 2559 | try_mount_again: |
2d6d589d | 2560 | #endif |
a2934c7b JL |
2561 | rc = 0; |
2562 | tcon = NULL; | |
2563 | pSesInfo = NULL; | |
2564 | srvTcp = NULL; | |
1bfe73c2 | 2565 | full_path = NULL; |
1da177e4 LT |
2566 | |
2567 | xid = GetXid(); | |
2568 | ||
7586b765 JL |
2569 | volume_info = kzalloc(sizeof(struct smb_vol), GFP_KERNEL); |
2570 | if (!volume_info) { | |
2571 | rc = -ENOMEM; | |
2572 | goto out; | |
2573 | } | |
50c2f753 | 2574 | |
7586b765 | 2575 | if (cifs_parse_mount_options(mount_data, devname, volume_info)) { |
70fe7dc0 JL |
2576 | rc = -EINVAL; |
2577 | goto out; | |
1da177e4 LT |
2578 | } |
2579 | ||
7586b765 | 2580 | if (volume_info->nullauth) { |
b6b38f70 | 2581 | cFYI(1, "null user"); |
7586b765 JL |
2582 | volume_info->username = ""; |
2583 | } else if (volume_info->username) { | |
1da177e4 | 2584 | /* BB fixme parse for domain name here */ |
b6b38f70 | 2585 | cFYI(1, "Username: %s", volume_info->username); |
1da177e4 | 2586 | } else { |
bf820679 | 2587 | cifserror("No username specified"); |
50c2f753 SF |
2588 | /* In userspace mount helper we can get user name from alternate |
2589 | locations such as env variables and files on disk */ | |
70fe7dc0 JL |
2590 | rc = -EINVAL; |
2591 | goto out; | |
1da177e4 LT |
2592 | } |
2593 | ||
1da177e4 | 2594 | /* this is needed for ASCII cp to Unicode converts */ |
7586b765 | 2595 | if (volume_info->iocharset == NULL) { |
a5fc4ce0 JL |
2596 | /* load_nls_default cannot return null */ |
2597 | volume_info->local_nls = load_nls_default(); | |
1da177e4 | 2598 | } else { |
a5fc4ce0 JL |
2599 | volume_info->local_nls = load_nls(volume_info->iocharset); |
2600 | if (volume_info->local_nls == NULL) { | |
b6b38f70 JP |
2601 | cERROR(1, "CIFS mount error: iocharset %s not found", |
2602 | volume_info->iocharset); | |
70fe7dc0 JL |
2603 | rc = -ELIBACC; |
2604 | goto out; | |
1da177e4 LT |
2605 | } |
2606 | } | |
a5fc4ce0 | 2607 | cifs_sb->local_nls = volume_info->local_nls; |
1da177e4 | 2608 | |
63c038c2 | 2609 | /* get a reference to a tcp session */ |
7586b765 | 2610 | srvTcp = cifs_get_tcp_session(volume_info); |
63c038c2 JL |
2611 | if (IS_ERR(srvTcp)) { |
2612 | rc = PTR_ERR(srvTcp); | |
2613 | goto out; | |
1da177e4 LT |
2614 | } |
2615 | ||
36988c76 JL |
2616 | /* get a reference to a SMB session */ |
2617 | pSesInfo = cifs_get_smb_ses(srvTcp, volume_info); | |
2618 | if (IS_ERR(pSesInfo)) { | |
2619 | rc = PTR_ERR(pSesInfo); | |
2620 | pSesInfo = NULL; | |
2621 | goto mount_fail_check; | |
1da177e4 | 2622 | } |
50c2f753 | 2623 | |
d00c28de JL |
2624 | setup_cifs_sb(volume_info, cifs_sb); |
2625 | if (pSesInfo->capabilities & CAP_LARGE_FILES) | |
2626 | sb->s_maxbytes = MAX_LFS_FILESIZE; | |
2627 | else | |
2628 | sb->s_maxbytes = MAX_NON_LFS; | |
1da177e4 | 2629 | |
8af18971 | 2630 | /* BB FIXME fix time_gran to be larger for LANMAN sessions */ |
1da177e4 LT |
2631 | sb->s_time_gran = 100; |
2632 | ||
d00c28de JL |
2633 | /* search for existing tcon to this server share */ |
2634 | tcon = cifs_get_tcon(pSesInfo, volume_info); | |
2635 | if (IS_ERR(tcon)) { | |
2636 | rc = PTR_ERR(tcon); | |
2637 | tcon = NULL; | |
1bfe73c2 | 2638 | goto remote_path_check; |
d00c28de | 2639 | } |
1bfe73c2 | 2640 | |
d82c2df5 | 2641 | cifs_sb->tcon = tcon; |
c18c842b | 2642 | |
d82c2df5 SF |
2643 | /* do not care if following two calls succeed - informational */ |
2644 | if (!tcon->ipc) { | |
2645 | CIFSSMBQFSDeviceInfo(xid, tcon); | |
2646 | CIFSSMBQFSAttributeInfo(xid, tcon); | |
2647 | } | |
03a143c9 | 2648 | |
d82c2df5 SF |
2649 | /* tell server which Unix caps we support */ |
2650 | if (tcon->ses->capabilities & CAP_UNIX) | |
2651 | /* reset of caps checks mount to see if unix extensions | |
2652 | disabled for just this mount */ | |
7586b765 | 2653 | reset_cifs_unix_caps(xid, tcon, sb, volume_info); |
d82c2df5 SF |
2654 | else |
2655 | tcon->unix_ext = 0; /* server does not support them */ | |
c18c842b | 2656 | |
d82c2df5 SF |
2657 | /* convert forward to back slashes in prepath here if needed */ |
2658 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2659 | convert_delimiter(cifs_sb->prepath, CIFS_DIR_SEP(cifs_sb)); | |
03a143c9 | 2660 | |
d82c2df5 SF |
2661 | if ((tcon->unix_ext == 0) && (cifs_sb->rsize > (1024 * 127))) { |
2662 | cifs_sb->rsize = 1024 * 127; | |
b6b38f70 | 2663 | cFYI(DBG2, "no very large read support, rsize now 127K"); |
1da177e4 | 2664 | } |
d82c2df5 SF |
2665 | if (!(tcon->ses->capabilities & CAP_LARGE_WRITE_X)) |
2666 | cifs_sb->wsize = min(cifs_sb->wsize, | |
2667 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
2668 | if (!(tcon->ses->capabilities & CAP_LARGE_READ_X)) | |
2669 | cifs_sb->rsize = min(cifs_sb->rsize, | |
2670 | (tcon->ses->server->maxBuf - MAX_CIFS_HDR_SIZE)); | |
1da177e4 | 2671 | |
1bfe73c2 IM |
2672 | remote_path_check: |
2673 | /* check if a whole path (including prepath) is not remote */ | |
2674 | if (!rc && cifs_sb->prepathlen && tcon) { | |
e4cce94c IM |
2675 | /* build_path_to_root works only when we have a valid tcon */ |
2676 | full_path = cifs_build_path_to_root(cifs_sb); | |
2677 | if (full_path == NULL) { | |
2678 | rc = -ENOMEM; | |
2679 | goto mount_fail_check; | |
2680 | } | |
2681 | rc = is_path_accessible(xid, tcon, cifs_sb, full_path); | |
1bfe73c2 | 2682 | if (rc != -EREMOTE) { |
e4cce94c IM |
2683 | kfree(full_path); |
2684 | goto mount_fail_check; | |
2685 | } | |
2686 | kfree(full_path); | |
2687 | } | |
2688 | ||
1bfe73c2 IM |
2689 | /* get referral if needed */ |
2690 | if (rc == -EREMOTE) { | |
d036f50f | 2691 | #ifdef CONFIG_CIFS_DFS_UPCALL |
5c2503a8 IM |
2692 | if (referral_walks_count > MAX_NESTED_LINKS) { |
2693 | /* | |
2694 | * BB: when we implement proper loop detection, | |
2695 | * we will remove this check. But now we need it | |
2696 | * to prevent an indefinite loop if 'DFS tree' is | |
2697 | * misconfigured (i.e. has loops). | |
2698 | */ | |
2699 | rc = -ELOOP; | |
2700 | goto mount_fail_check; | |
2701 | } | |
1bfe73c2 IM |
2702 | /* convert forward to back slashes in prepath here if needed */ |
2703 | if ((cifs_sb->mnt_cifs_flags & CIFS_MOUNT_POSIX_PATHS) == 0) | |
2704 | convert_delimiter(cifs_sb->prepath, | |
2705 | CIFS_DIR_SEP(cifs_sb)); | |
2706 | full_path = build_unc_path_to_root(volume_info, cifs_sb); | |
2707 | if (IS_ERR(full_path)) { | |
2708 | rc = PTR_ERR(full_path); | |
2709 | goto mount_fail_check; | |
2710 | } | |
2711 | ||
b6b38f70 | 2712 | cFYI(1, "Getting referral for: %s", full_path); |
1bfe73c2 IM |
2713 | rc = get_dfs_path(xid, pSesInfo , full_path + 1, |
2714 | cifs_sb->local_nls, &num_referrals, &referrals, | |
2715 | cifs_sb->mnt_cifs_flags & CIFS_MOUNT_MAP_SPECIAL_CHR); | |
2716 | if (!rc && num_referrals > 0) { | |
2717 | char *fake_devname = NULL; | |
2718 | ||
2719 | if (mount_data != mount_data_global) | |
2720 | kfree(mount_data); | |
7b91e266 | 2721 | |
1bfe73c2 IM |
2722 | mount_data = cifs_compose_mount_options( |
2723 | cifs_sb->mountdata, full_path + 1, | |
2724 | referrals, &fake_devname); | |
7b91e266 | 2725 | |
1bfe73c2 | 2726 | free_dfs_info_array(referrals, num_referrals); |
7b91e266 JL |
2727 | kfree(fake_devname); |
2728 | kfree(full_path); | |
2729 | ||
2730 | if (IS_ERR(mount_data)) { | |
2731 | rc = PTR_ERR(mount_data); | |
2732 | mount_data = NULL; | |
2733 | goto mount_fail_check; | |
2734 | } | |
1bfe73c2 IM |
2735 | |
2736 | if (tcon) | |
2737 | cifs_put_tcon(tcon); | |
2738 | else if (pSesInfo) | |
2739 | cifs_put_smb_ses(pSesInfo); | |
2740 | ||
2741 | cleanup_volume_info(&volume_info); | |
5c2503a8 | 2742 | referral_walks_count++; |
a2934c7b | 2743 | FreeXid(xid); |
1bfe73c2 IM |
2744 | goto try_mount_again; |
2745 | } | |
d036f50f SF |
2746 | #else /* No DFS support, return error on mount */ |
2747 | rc = -EOPNOTSUPP; | |
2748 | #endif | |
1bfe73c2 IM |
2749 | } |
2750 | ||
2751 | mount_fail_check: | |
2752 | /* on error free sesinfo and tcon struct if needed */ | |
2753 | if (rc) { | |
2754 | if (mount_data != mount_data_global) | |
2755 | kfree(mount_data); | |
2756 | /* If find_unc succeeded then rc == 0 so we can not end */ | |
2757 | /* up accidently freeing someone elses tcon struct */ | |
2758 | if (tcon) | |
2759 | cifs_put_tcon(tcon); | |
2760 | else if (pSesInfo) | |
2761 | cifs_put_smb_ses(pSesInfo); | |
2762 | else | |
2763 | cifs_put_tcp_session(srvTcp); | |
2764 | goto out; | |
2765 | } | |
2766 | ||
7586b765 | 2767 | /* volume_info->password is freed above when existing session found |
1da177e4 LT |
2768 | (in which case it is not needed anymore) but when new sesion is created |
2769 | the password ptr is put in the new session structure (in which case the | |
2770 | password will be freed at unmount time) */ | |
70fe7dc0 JL |
2771 | out: |
2772 | /* zero out password before freeing */ | |
1bfe73c2 | 2773 | cleanup_volume_info(&volume_info); |
1da177e4 LT |
2774 | FreeXid(xid); |
2775 | return rc; | |
2776 | } | |
2777 | ||
1da177e4 LT |
2778 | int |
2779 | CIFSTCon(unsigned int xid, struct cifsSesInfo *ses, | |
2780 | const char *tree, struct cifsTconInfo *tcon, | |
2781 | const struct nls_table *nls_codepage) | |
2782 | { | |
2783 | struct smb_hdr *smb_buffer; | |
2784 | struct smb_hdr *smb_buffer_response; | |
2785 | TCONX_REQ *pSMB; | |
2786 | TCONX_RSP *pSMBr; | |
2787 | unsigned char *bcc_ptr; | |
2788 | int rc = 0; | |
cc20c031 | 2789 | int length, bytes_left; |
1da177e4 LT |
2790 | __u16 count; |
2791 | ||
2792 | if (ses == NULL) | |
2793 | return -EIO; | |
2794 | ||
2795 | smb_buffer = cifs_buf_get(); | |
ca43e3be | 2796 | if (smb_buffer == NULL) |
1da177e4 | 2797 | return -ENOMEM; |
ca43e3be | 2798 | |
1da177e4 LT |
2799 | smb_buffer_response = smb_buffer; |
2800 | ||
2801 | header_assemble(smb_buffer, SMB_COM_TREE_CONNECT_ANDX, | |
2802 | NULL /*no tid */ , 4 /*wct */ ); | |
1982c344 SF |
2803 | |
2804 | smb_buffer->Mid = GetNextMid(ses->server); | |
1da177e4 LT |
2805 | smb_buffer->Uid = ses->Suid; |
2806 | pSMB = (TCONX_REQ *) smb_buffer; | |
2807 | pSMBr = (TCONX_RSP *) smb_buffer_response; | |
2808 | ||
2809 | pSMB->AndXCommand = 0xFF; | |
2810 | pSMB->Flags = cpu_to_le16(TCON_EXTENDED_SECINFO); | |
1da177e4 | 2811 | bcc_ptr = &pSMB->Password[0]; |
fb8c4b14 | 2812 | if ((ses->server->secMode) & SECMODE_USER) { |
eeac8047 | 2813 | pSMB->PasswordLength = cpu_to_le16(1); /* minimum */ |
7c7b25bc | 2814 | *bcc_ptr = 0; /* password is null byte */ |
eeac8047 | 2815 | bcc_ptr++; /* skip password */ |
7c7b25bc | 2816 | /* already aligned so no need to do it below */ |
eeac8047 | 2817 | } else { |
7c7b25bc | 2818 | pSMB->PasswordLength = cpu_to_le16(CIFS_SESS_KEY_SIZE); |
eeac8047 SF |
2819 | /* BB FIXME add code to fail this if NTLMv2 or Kerberos |
2820 | specified as required (when that support is added to | |
2821 | the vfs in the future) as only NTLM or the much | |
7c7b25bc | 2822 | weaker LANMAN (which we do not send by default) is accepted |
eeac8047 SF |
2823 | by Samba (not sure whether other servers allow |
2824 | NTLMv2 password here) */ | |
7c7b25bc | 2825 | #ifdef CONFIG_CIFS_WEAK_PW_HASH |
04912d6a | 2826 | if ((global_secflags & CIFSSEC_MAY_LANMAN) && |
00e485b0 JL |
2827 | (ses->server->secType == LANMAN)) |
2828 | calc_lanman_hash(tcon->password, ses->server->cryptKey, | |
4e53a3fb JL |
2829 | ses->server->secMode & |
2830 | SECMODE_PW_ENCRYPT ? true : false, | |
2831 | bcc_ptr); | |
7c7b25bc SF |
2832 | else |
2833 | #endif /* CIFS_WEAK_PW_HASH */ | |
00e485b0 | 2834 | SMBNTencrypt(tcon->password, ses->server->cryptKey, |
eeac8047 SF |
2835 | bcc_ptr); |
2836 | ||
7c7b25bc | 2837 | bcc_ptr += CIFS_SESS_KEY_SIZE; |
fb8c4b14 | 2838 | if (ses->capabilities & CAP_UNICODE) { |
7c7b25bc SF |
2839 | /* must align unicode strings */ |
2840 | *bcc_ptr = 0; /* null byte password */ | |
2841 | bcc_ptr++; | |
2842 | } | |
eeac8047 | 2843 | } |
1da177e4 | 2844 | |
50c2f753 | 2845 | if (ses->server->secMode & |
a878fb22 | 2846 | (SECMODE_SIGN_REQUIRED | SECMODE_SIGN_ENABLED)) |
1da177e4 LT |
2847 | smb_buffer->Flags2 |= SMBFLG2_SECURITY_SIGNATURE; |
2848 | ||
2849 | if (ses->capabilities & CAP_STATUS32) { | |
2850 | smb_buffer->Flags2 |= SMBFLG2_ERR_STATUS; | |
2851 | } | |
2852 | if (ses->capabilities & CAP_DFS) { | |
2853 | smb_buffer->Flags2 |= SMBFLG2_DFS; | |
2854 | } | |
2855 | if (ses->capabilities & CAP_UNICODE) { | |
2856 | smb_buffer->Flags2 |= SMBFLG2_UNICODE; | |
2857 | length = | |
50c2f753 SF |
2858 | cifs_strtoUCS((__le16 *) bcc_ptr, tree, |
2859 | 6 /* max utf8 char length in bytes */ * | |
a878fb22 SF |
2860 | (/* server len*/ + 256 /* share len */), nls_codepage); |
2861 | bcc_ptr += 2 * length; /* convert num 16 bit words to bytes */ | |
1da177e4 LT |
2862 | bcc_ptr += 2; /* skip trailing null */ |
2863 | } else { /* ASCII */ | |
1da177e4 LT |
2864 | strcpy(bcc_ptr, tree); |
2865 | bcc_ptr += strlen(tree) + 1; | |
2866 | } | |
2867 | strcpy(bcc_ptr, "?????"); | |
2868 | bcc_ptr += strlen("?????"); | |
2869 | bcc_ptr += 1; | |
2870 | count = bcc_ptr - &pSMB->Password[0]; | |
2871 | pSMB->hdr.smb_buf_length += count; | |
2872 | pSMB->ByteCount = cpu_to_le16(count); | |
2873 | ||
133672ef SF |
2874 | rc = SendReceive(xid, ses, smb_buffer, smb_buffer_response, &length, |
2875 | CIFS_STD_OP); | |
1da177e4 | 2876 | |
1da177e4 LT |
2877 | /* above now done in SendReceive */ |
2878 | if ((rc == 0) && (tcon != NULL)) { | |
0e0d2cf3 SF |
2879 | bool is_unicode; |
2880 | ||
1da177e4 | 2881 | tcon->tidStatus = CifsGood; |
3b795210 | 2882 | tcon->need_reconnect = false; |
1da177e4 LT |
2883 | tcon->tid = smb_buffer_response->Tid; |
2884 | bcc_ptr = pByteArea(smb_buffer_response); | |
cc20c031 JL |
2885 | bytes_left = BCC(smb_buffer_response); |
2886 | length = strnlen(bcc_ptr, bytes_left - 2); | |
0e0d2cf3 SF |
2887 | if (smb_buffer->Flags2 & SMBFLG2_UNICODE) |
2888 | is_unicode = true; | |
2889 | else | |
2890 | is_unicode = false; | |
2891 | ||
cc20c031 | 2892 | |
50c2f753 | 2893 | /* skip service field (NB: this field is always ASCII) */ |
7f8ed420 SF |
2894 | if (length == 3) { |
2895 | if ((bcc_ptr[0] == 'I') && (bcc_ptr[1] == 'P') && | |
2896 | (bcc_ptr[2] == 'C')) { | |
b6b38f70 | 2897 | cFYI(1, "IPC connection"); |
7f8ed420 SF |
2898 | tcon->ipc = 1; |
2899 | } | |
2900 | } else if (length == 2) { | |
2901 | if ((bcc_ptr[0] == 'A') && (bcc_ptr[1] == ':')) { | |
2902 | /* the most common case */ | |
b6b38f70 | 2903 | cFYI(1, "disk share connection"); |
7f8ed420 SF |
2904 | } |
2905 | } | |
50c2f753 | 2906 | bcc_ptr += length + 1; |
cc20c031 | 2907 | bytes_left -= (length + 1); |
1da177e4 | 2908 | strncpy(tcon->treeName, tree, MAX_TREE_SIZE); |
cc20c031 JL |
2909 | |
2910 | /* mostly informational -- no need to fail on error here */ | |
90a98b2f | 2911 | kfree(tcon->nativeFileSystem); |
d185cda7 | 2912 | tcon->nativeFileSystem = cifs_strndup_from_ucs(bcc_ptr, |
0e0d2cf3 | 2913 | bytes_left, is_unicode, |
cc20c031 JL |
2914 | nls_codepage); |
2915 | ||
b6b38f70 | 2916 | cFYI(1, "nativeFileSystem=%s", tcon->nativeFileSystem); |
cc20c031 | 2917 | |
fb8c4b14 | 2918 | if ((smb_buffer_response->WordCount == 3) || |
1a4e15a0 SF |
2919 | (smb_buffer_response->WordCount == 7)) |
2920 | /* field is in same location */ | |
3979877e SF |
2921 | tcon->Flags = le16_to_cpu(pSMBr->OptionalSupport); |
2922 | else | |
2923 | tcon->Flags = 0; | |
b6b38f70 | 2924 | cFYI(1, "Tcon flags: 0x%x ", tcon->Flags); |
1da177e4 | 2925 | } else if ((rc == 0) && tcon == NULL) { |
50c2f753 | 2926 | /* all we need to save for IPC$ connection */ |
1da177e4 LT |
2927 | ses->ipc_tid = smb_buffer_response->Tid; |
2928 | } | |
2929 | ||
a8a11d39 | 2930 | cifs_buf_release(smb_buffer); |
1da177e4 LT |
2931 | return rc; |
2932 | } | |
2933 | ||
2934 | int | |
2935 | cifs_umount(struct super_block *sb, struct cifs_sb_info *cifs_sb) | |
2936 | { | |
2937 | int rc = 0; | |
50c2f753 | 2938 | char *tmp; |
1da177e4 | 2939 | |
f1987b44 JL |
2940 | if (cifs_sb->tcon) |
2941 | cifs_put_tcon(cifs_sb->tcon); | |
50c2f753 | 2942 | |
1da177e4 | 2943 | cifs_sb->tcon = NULL; |
2fe87f02 SF |
2944 | tmp = cifs_sb->prepath; |
2945 | cifs_sb->prepathlen = 0; | |
2946 | cifs_sb->prepath = NULL; | |
2947 | kfree(tmp); | |
1da177e4 | 2948 | |
88e7d705 | 2949 | return rc; |
50c2f753 | 2950 | } |
1da177e4 | 2951 | |
198b5682 | 2952 | int cifs_negotiate_protocol(unsigned int xid, struct cifsSesInfo *ses) |
1da177e4 LT |
2953 | { |
2954 | int rc = 0; | |
198b5682 | 2955 | struct TCP_Server_Info *server = ses->server; |
1da177e4 | 2956 | |
198b5682 JL |
2957 | /* only send once per connect */ |
2958 | if (server->maxBuf != 0) | |
2959 | return 0; | |
2960 | ||
2961 | rc = CIFSSMBNegotiate(xid, ses); | |
2962 | if (rc == -EAGAIN) { | |
2963 | /* retry only once on 1st time connection */ | |
2964 | rc = CIFSSMBNegotiate(xid, ses); | |
2965 | if (rc == -EAGAIN) | |
2966 | rc = -EHOSTDOWN; | |
1da177e4 | 2967 | } |
198b5682 JL |
2968 | if (rc == 0) { |
2969 | spin_lock(&GlobalMid_Lock); | |
2970 | if (server->tcpStatus != CifsExiting) | |
2971 | server->tcpStatus = CifsGood; | |
2972 | else | |
2973 | rc = -EHOSTDOWN; | |
2974 | spin_unlock(&GlobalMid_Lock); | |
26b994fa | 2975 | |
198b5682 JL |
2976 | } |
2977 | ||
2978 | return rc; | |
2979 | } | |
2980 | ||
2981 | ||
2982 | int cifs_setup_session(unsigned int xid, struct cifsSesInfo *ses, | |
2983 | struct nls_table *nls_info) | |
2984 | { | |
2985 | int rc = 0; | |
2986 | struct TCP_Server_Info *server = ses->server; | |
26b994fa | 2987 | |
198b5682 JL |
2988 | ses->flags = 0; |
2989 | ses->capabilities = server->capabilities; | |
26b994fa | 2990 | if (linuxExtEnabled == 0) |
198b5682 | 2991 | ses->capabilities &= (~CAP_UNIX); |
20418acd | 2992 | |
b6b38f70 JP |
2993 | cFYI(1, "Security Mode: 0x%x Capabilities: 0x%x TimeAdjust: %d", |
2994 | server->secMode, server->capabilities, server->timeAdj); | |
cb7691b6 | 2995 | |
198b5682 | 2996 | rc = CIFS_SessSetup(xid, ses, nls_info); |
26b994fa | 2997 | if (rc) { |
b6b38f70 | 2998 | cERROR(1, "Send error in SessSetup = %d", rc); |
26b994fa | 2999 | } else { |
b6b38f70 | 3000 | cFYI(1, "CIFS Session Established successfully"); |
20418acd | 3001 | spin_lock(&GlobalMid_Lock); |
198b5682 JL |
3002 | ses->status = CifsGood; |
3003 | ses->need_reconnect = false; | |
20418acd | 3004 | spin_unlock(&GlobalMid_Lock); |
1da177e4 | 3005 | } |
26b994fa | 3006 | |
1da177e4 LT |
3007 | return rc; |
3008 | } | |
3009 |